2,4,8-trisubstituted-8h-pyrido[2,3-d]pyrimidin-7-one compounds and compositions for use in therapy

ABSTRACT

Novel substituted 2,4,8-trisubstituted-8H-pyrido[2,3-d]pyrimidin-7-one compounds and compositions for use in therapy as CSBP/p38 kinase inhibitors.

CROSS REFERENCE OF PRIOR APPLICATIONS

This application is a continuation of U.S. application Ser. No.11/839,834 filed 16 Aug. 2007; which is a continuation of U.S.application Ser. No. 10/399,614 filed 18 Apr. 2003, issued as U.S. Pat.No. 7,323,472; which is the national stage entry of PCT/US01/50493,filed 23 Oct. 2001; which claims the benefit of priority of U.S.Provisional Application No. 60/242,461 filed 23 Oct. 2000; 60/310,349filed 6 Aug. 2001; and 60/326,618, filed 2 Oct. 2001.

FIELD OF THE INVENTION

This invention relates to a novel group of2,4,8-trisubstituted-8H-pyrido[2,3-d]pyrimidin-7-one compounds,processes for the preparation thereof, the use thereof in treatingCSBP/p38 kinase mediated diseases and pharmaceutical compositions foruse in such therapy.

BACKGROUND OF THE INVENTION

Intracellular signal transduction is the means by which cells respond toextracellular stimuli. Regardless of the nature of the cell surfacereceptor (e. g. protein tyrosine kinase or seven-transmembrane G-proteincoupled), protein kinases and phosphatases along with phopholipases arethe essential machinery by which the signal is further transmittedwithin the cell [Marshall, J. C. Cell, 80, 179-278 (1995)]. Proteinkinases can be categorized into five classes with the two major classesbeing, tyrosine kinases and serine/threonine kinases depending uponwhether the enzyme phosphorylates its substrate(s) on specifictyrosine(s) or serine/threonine(s) residues [Hunter, T., Methods inEnzymology (Protein Kinase Classification) p. 3, Hunter, T.; Sefton, B.M.; eds. vol. 200, Academic Press; San Diego, 1991].

For most biological responses, multiple intracellular kinases areinvolved and an individual kinase can be involved in more than onesignaling event. These kinases are often cytosolic and can translocateto the nucleus or the ribosomes where they can affect transcriptionaland translational events, respectively. The involvement of kinases intranscriptional control is presently much better understood than theireffect on translation as illustrated by the studies on growth factorinduced signal transduction involving MAP/ERK kinase [Marshall, C. J.Cell, 80, 179 (1995); Herskowitz, I. Cell, 80, 187 (1995); Hunter, T.Cell, 80, 225 (1995); Seger, R., and Krebs, E. G. FASEB J., 726-735(1995)].

While many signaling pathways are part of cell homeostasis, numerouscytokines (e.g., IL-1 and TNF) and certain other mediators ofinflammation (e.g., COX-2, and iNOS) are produced only as a response tostress signals such as bacterial lipopolysaccharide (LPS). The firstindications suggesting that the signal transduction pathway leading toLPS-induced cytokine biosynthesis involved protein kinases came fromstudies of Weinstein [Weinstein, et al., J. Immunol. 151, 3829(1993)]but the specific protein kinases involved were not identified. Workingfrom a similar perspective, Han [Han, et al., Science 265, 808(1994)]identified murine p38 as a kinase which is tyrosine phosphorylated inresponse to LPS. Definitive proof of the involvement of the p38 kinasein LPS-stimulated signal transduction pathway leading to the initiationof proinflammatory cytokine biosynthesis was provided by the independentdiscovery of p38 kinase by Lee [Lee; et al., Nature, 372, 739(1994)] asthe molecular target for a novel class of anti-inflammatory agents. Thediscovery of p38 (termed by Lee as CSBP 1 and 2) provided a mechanism ofaction of a class of anti-inflammatory compounds for which SK&F 86002was the prototypic example. These compounds inhibited IL-1 and TNFsynthesis in human monocytes at concentrations in the low uM range [Lee,et al., Int. J. Immunopharmac. 10(7), 835(1988)] and exhibited activityin animal models which are refractory to cyclooxygenase inhibitors [Lee;et al., Annals N. Y. Acad. Sci., 696, 149(1993)].

It is now firmly established that CSBP/p38 is a one of several kinasesinvolved in a stress-response signal transduction pathway which isparallel to and largely independent of the analogous mitogen-activatedprotein kinase (MAP) kinase cascade. Stress signals, including LPS,pro-inflammatory cytokines, oxidants, UV light and osmotic stress,activate kinases upstream from CSBP/p38 which in turn phosphorylateCSBP/p38 at threonine 180 and tyrosine 182 resulting in CSBP/p38activation. MAPKAP kinase-2 and MAPKAP kinase-3 have been identified asdownstream substrates of CSBP/p38 which in turn phosphorylate heat shockprotein Hsp 27 (FIG. 1). Additional downstream substrates known to bephosphorylated by p38 include kinases (Mnk1/2, MSK1/2 and PRAK) andtranscription factors (CHOP, MEF2, ATF2 and CREB). While many of thesignaling pathways required for cytokine biosynthesis remain unknown itappears clear that many of the substrates for p38 listed above areinvolved. [Cohen, P. Trends Cell Biol., 353-361(1997) and Lee, J. C. etal, Pharmacol. Ther. vol. 82, nos. 2-3, pp. 389-397, 1999].

What is known, however, is that in addition to inhibiting IL-1 and TNF,CSBP/p38 kinase inhibitors (SK&F 86002 and SB 203580) also decrease thesynthesis of a wide variety of pro-inflammatory proteins including,IL-6, IL-8, GM-CSF and COX-2. Inhibitors of CSBP/p38 kinase have alsobeen shown to suppress the TNF-induced expression of VCAM-1 onendothelial cells, the TNF-induced phosphorylation and activation ofcytosolic PLA2 and the IL-1-stimulated synthesis of collagenase andstromelysin. These and additional data demonstrate that CSBP/p38 isinvolved not only cytokine synthesis, but also in cytokine signaling[CSBP/P38 kinase reviewed in Cohen, P. Trends Cell Biol.,353-361(1997)].

Interleukin-1 (IL-1) and Tumor Necrosis Factor (TNF) are biologicalsubstances produced by a variety of cells, such as monocytes ormacrophages. IL-1 has been demonstrated to mediate a variety ofbiological activities thought to be important in immunoregulation andother physiological conditions such as inflammation [See, e.g.,Dinarello et al., Rev. Infect. Disease, 6, 51 (1984)]. The myriad ofknown biological activities of IL-1 include the activation of T helpercells, induction of fever, stimulation of prostaglandin or collagenaseproduction, neutrophil chemotaxis, induction of acute phase proteins andthe suppression of plasma iron levels.

There are many disease states in which excessive or unregulated IL-1production is implicated in exacerbating and/or causing the disease.These include rheumatoid arthritis, osteoarthritis, endotoxemia and/ortoxic shock syndrome, other acute or chronic inflammatory disease statessuch as the inflammatory reaction induced by endotoxin or inflammatorybowel disease; tuberculosis, atherosclerosis, muscle degeneration,cachexia, psoriatic arthritis, Reiter's syndrome, rheumatoid arthritis,gout, traumatic arthritis, rubella arthritis, and acute synovitis.Evidence also links IL-1 activity to diabetes and pancreatic β cells[review of the biological activities which have been attributed to IL-1Dinarello, J. Clinical Immunology, 5 (5), 287-297 (1985)].

Excessive or unregulated TNF production has been implicated in mediatingor exacerbating a number of diseases including rheumatoid arthritis,rheumatoid spondylitis, osteoarthritis, gouty arthritis and otherarthritic conditions; sepsis, septic shock, endotoxic shock, gramnegative sepsis, toxic shock syndrome, adult respiratory distresssyndrome, cerebral malaria, chronic pulmonary inflammatory disease,silicosis, pulmonary sarcoisosis, bone resorption diseases, reperfusioninjury, graft vs. host reaction, allograft rejections, fever andmyalgias due to infection, such as influenza, cachexia secondary toinfection or malignancy, cachexia, secondary to acquired immunedeficiency syndrome (AIDS), AIDS, ARC (AIDS related complex), keloidformation, scar tissue formation, Crohn's disease, ulcerative colitis,or pyresis.

Interleukin-8 (IL-8) is a chemotactic factor produced by several celltypes including mononuclear cells, fibroblasts, endothelial cells, andkeratinocytes. Its production from endothelial cells is induced by IL-1,TNF, or lipopolysachharide (LPS). IL-8 stimulates a number of functionsin vitro. It has been shown to have chemoattractant properties forneutrophils, T-lymphocytes, and basophils. In addition it induceshistamine release from basophils from both normal and atopic individualsas well as lysozomal enzyme release and respiratory burst fromneutrophils. IL-8 has also been shown to increase the surface expressionof Mac-1 (CD11b/CD18) on neutrophils without de novo protein synthesis,this may contribute to increased adhesion of the neutrophils to vascularendothelial cells. Many diseases are characterized by massive neutrophilinfiltration. Conditions associated with an increased in IL-8 production(which is responsible for chemotaxis of neutrophil into the inflammatorysite) would benefit by compounds which are suppressive of IL-8production.

IL-1 and TNF affect a wide variety of cells and tissues and thesecytokines as well as other leukocyte derived cytokines are important andcritical inflammatory mediators of a wide variety of disease states andconditions. The inhibition of these cytokines is of benefit incontrolling, reducing and alleviating many of these disease states.

In addition to the involvement of CSBP/p38 signaling in the productionof IL-1, TNF, IL-8, IL-6, GM-CSF, COX-2, collagenase and stromelysin,signal transduction via CSBP/p38 is required for the action of severalof these same pro-inflammatory proteins plus many others (VEGF, PDGF,NGF) [Ono, K. and Han, J., Cellular Signaling, 12 1-13 (2000)]. Theinvolvement of CSBP/p38 in multiple stress-induced signal transductionpathways provides additional rationale for the potential utility ofCSBP/p38 in the treatment of diseases resulting from the excessive anddestructive activation of the immune system. This expectation issupported by the potent and diverse activities described for CSBP/p38kinase inhibitors [Badger, et al., J. Pharm. Exp. Thera. 279 (3):1453-1461.(1996); Griswold, et al, Pharmacol. Comm. 7, 323-229 (1996);Jackson, et al., J. Pharmacol. Exp. Ther. 284, 687-692 (1998);Underwood, et al., J. Pharmacol. Exp. Ther. 293, 281-288 (2000); Badger,et al., Arthritis Rheum. 43, 175-183 (2000)].

There remains a need for treatment, in this field, for compounds whichare cytokine suppressive anti-inflammatory drugs, i.e. compounds whichare capable of inhibiting the CSBP/p38/RK kinase.

Other pyrido[2,3-d]pyrimidine containing pharmacophores having varyingpharmaceutical, insecticidal, and herbicidal activity may be found inthe art, such as in WO 98/33798; WO 98/23613; WO 95/19774, now U.S. Pat.No. 6,265,410; WO 00/23444; WO 01/19828 (published after the filing dateof this application); U.S. Pat. No. 5,532,370; U.S. Pat. No. 5,597,776;JP 2000-38350; WO 00/43374; WO 98/08846; and WO 01/55147 (also publishedafter the filing date of this application).

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 demonstrates the p38 kinase cascade.

SUMMARY OF THE INVENTION

This invention relates to the novel compounds of Formula (I) and (Ia),and Formula (II) and (IIa), and pharmaceutical compositions comprising acompound of Formula (I) and (Ia), and Formula (II) and (IIa), and apharmaceutically acceptable diluent or carrier.

This invention relates to a method of treating a CSBP/RK/p38 kinasemediated disease in a mammal in need thereof, which comprisesadministering to said mammal an effective amount of a compound ofFormula (I) and (Ia), and Formula (II) and (IIa).

This invention also relates to a method of inhibiting cytokines and thetreatment of a cytokine mediated disease, in a mammal in need thereof,which comprises administering to said mammal an effective amount of acompound of Formula (I) and (Ia), and Formula (II) and (IIa).

This invention more specifically relates to a method of inhibiting theproduction of IL-1 in a mammal in need thereof which comprisesadministering to said mammal an effective amount of a compound ofFormula (I) and (Ia), and Formula (II) and (IIa).

This invention more specifically relates to a method of inhibiting theproduction of IL-6 in a mammal in need thereof which comprisesadministering to said mammal an effective amount of a compound ofFormula (I) and (Ia), and Formula (II) and (IIa).

This invention more specifically relates to a method of inhibiting theproduction of IL-8 in a mammal in need thereof which comprisesadministering to said mammal an effective amount of a compound ofFormula (I) and (Ia), and Formula (II) and (IIa).

This invention more specifically relates to a method of inhibiting theproduction of TNF in a mammal in need thereof which comprisesadministering to said mammal an effective amount of a compound ofFormula (I) and (Ia), and Formula (II) and (IIa).

Accordingly, the present invention provides a compound of Formula (I)and (Ia):

wherein

-   R₁ is an optionally substituted aryl or an optionally substituted    heteroaryl ring;-   R₂ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylalkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are all optionally substituted, or R₂ is the moiety    X₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), or C(A₁)(A₂)(A₃);-   A₁ is an optionally substituted C₁₋₁₀ alkyl;-   A₂ is an optionally substituted C₁₋₁₀ alkyl;-   A₃ is hydrogen or is an optionally substituted C₁₋₁₀ alkyl;-   R₃ is an C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylC₁₋₄alkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are optionally substituted;-   R₄ and R₁₄ are each independently selected from hydrogen, optionally    substituted C₁₋₄ alkyl, optionally substituted C₃₋₇ cycloalkyl, C₃₋₇    cycloalkylC₁₋₄alkyl, optionally substituted aryl, or optionally    substituted aryl-C₁₋₄ alkyl, or R₄ and R₁₄ together with the    nitrogen which they are attached form an optionally substituted    heterocyclic ring of 4 to 7 members, which ring optionally contains    an additional heteroatom selected from oxygen, sulfur or NR₉;-   R₆ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, heterocyclyl,    heterocyclyl C₁₋₁₀alkyl, aryl, arylC₁₋₁₀ alkyl, heteroaryl or    heteroarylC₁₋₁₀ alkyl, wherein each of these moieties may be    optionally substituted;-   R₉ is hydrogen, C(Z)R₆ or optionally substituted C₁₋₁₀ alkyl,    optionally substituted aryl or optionally substituted aryl-C₁₋₄    alkyl;-   R₁₀ and R₂₀ are independently selected from hydrogen or C₁₋₄alkyl;-   X is R₂, OR₂, S(O)_(m)R₂, (CH₂)_(n)N(R₁₀)S(O)_(m)R₂,    (CH₂)_(n)N(R₁₀)C(O)R₂, (CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂;-   X₁ is N(R₁₀), O, S(O)_(m), or CR₁₀R₂₀;-   n is 0 or an integer having a value of 1 to 10;-   m is 0 or an integer having a value of 1 or 2;-   q is 0 or an integer having a value of 1 to 10;-   Z is oxygen or sulfur;    or a pharmaceutically acceptable salt thereof.

DETAILED DESCRIPTION OF THE INVENTION

Another aspect of the present invention provides for the compound ofFormula (II) and (IIa):

wherein

-   R₁ is the moiety YRa;-   R₂ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylalkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are all optionally substituted, or R₂ is the moiety    X₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), or C(A₁)(A₂)(A₃);-   A₁ is an optionally substituted C₁₋₁₀ alkyl;-   A₂ is an optionally substituted C₁₋₁₀ alkyl;-   A₃ is hydrogen or is an optionally substituted C₁₋₁₀ alkyl;-   R₃ is an C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylC₁₋₄alkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are optionally substituted;-   R₄ and R₁₄ are each independently selected from hydrogen, optionally    substituted C₁₋₄ alkyl, optionally substituted C₃₋₇ cycloalkyl, C₃₋₇    cycloalkylC₁₋₄alkyl, optionally substituted aryl, or optionally    substituted aryl-C₁₋₄ alkyl, or R₄ and R₁₄ together with the    nitrogen which they are attached form an optionally substituted    heterocyclic ring of 4 to 7 members, which ring optionally contains    an additional heteroatom selected from oxygen, sulfur or NR₉;-   R₆ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, heterocyclyl,    heterocyclyl C₁₋₁₀alkyl, aryl, arylC₁₋₁₀ alkyl, heteroaryl or    heteroarylC₁₋₁₀ alkyl, wherein each of these moieties may be    optionally substituted;-   R₉ is hydrogen, C(Z)R₆ or optionally substituted C₁₋₁₀ alkyl,    optionally substituted aryl or optionally substituted aryl-C₁₋₄    alkyl;-   R₁₀ and R₂₀ are independently selected from hydrogen or C₁₋₄alkyl;-   Y is C(R_(b))(R_(d)), C(O), N(R_(d)), N(R_(d))C(R_(c))(R_(d)),    oxygen, OC(R_(c))(R_(d)), S(O)m, or S(O)_(m)C(R_(c))(R_(d));-   R_(a) is an aryl or heteroaryl ring, which ring is optionally    substituted;-   R_(b) is hydrogen, C₁₋₂ alkyl, NR_(c), hydroxy, thio, C₁₋₂ alkoxy,    S(O)_(m)C₁₋₂ alkyl;-   R_(c) is hydrogen or C₁₋₂ alkyl;-   R_(d) is hydrogen or C₁₋₂ alkyl;-   X is R₂, OR₂, S(O)_(m)R₂, (CH₂)_(n)N(R₁₀)S(O)_(m)R₂,    (CH₂)_(n)N(R₁₀)C(O)R₂, (CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂;-   X₁ is N(R₁₀), O, S(O)_(m), or CR₁₀R₂₀;-   n is 0 or an integer having a value of 1 to 10;-   m is 0 or an integer having a value of 1 or 2;-   q is 0 or an integer having a value of 1 to 10;-   Z is oxygen or sulfur;    or a pharmaceutically acceptable salt thereof.

The present invention is directed to novel compounds of Formula (I) and(Ia), and those of Formula (II) and (IIa), or a pharmaceuticallyacceptable salt thereof. As will be readily recognized, the differencebetween compounds of Formula (I) and (Ia) and that of Formula (II) and(IIa) lies in the unsaturation of the pyrido-7-one ring. The respectiveR₁, R₂, X and R₃ terms are the same for both groups within the Formulaitself, for instance I and Ia. For purposes herein, everythingapplicable to Formula (I) is also applicable to Formula (Ia) unlessotherwise indicated, and everything applicable to Formula (II) is alsoapplicable to Formula (IIa) unless otherwise indicated.

Suitably, for compounds of Formula (I), and (Ia), R₁ is an aryl, orheteroaryl ring, which ring is optionally substituted. The R₁ aryl orheteroaryl rings may be substituted one or more times, preferably 1 to 4times, independently, by substituents selected from halogen, C₁₋₄ alkyl,halo-substituted-C₁₋₄ alkyl, cyano, nitro, (CR₁₀R₂₀)_(v)NR₄R₁₄,(CR₁₀R₂₀)_(v)C(Z)NR₄R₁₄, (CR₁₀R₂₀)_(v)C(Z)OR₈, (CR₁₀R₂₀)_(v)COR_(a′),(CR₁₀R₂₀)_(v)C(O)H, SR₅, S(O)R₅, S(O)₂R₅, (CR₁₀R₂₀)_(v)OR₈, ZC(Z)R₁₁,NR₁₀C(Z)R₁₁, or NR₁₀S(O)₂R₇.

Preferably, R₁ is an aryl moiety, more preferably a phenyl ring,optionally substituted one or more times by halogen, C₁₋₄ alkyl, orhalo-substituted-C₁₋₄ alkyl. More preferably, the phenyl ring issubstituted in the 2, 4, or 6-position, or di-substituted in the2,4-position, such as 2-fluoro, 4-fluoro, 2,4-difluoro, or2-methyl-4-fluoro; or tri-substituted in the 2,4,6-position such as2,4,6-trifluoro.

Preferably, when R₁ is a heteroaryl moiety, the ring is not attached tothe pharmacophore via one of the heteroatoms, such as nitrogen to form acharged ring. For instance, a pyridinyl ring would be attached through acarbon atom to yield a 2-, 3- or 4-pyridyl moiety, which is optionallysubstituted.

Suitably, v is 0 or an integer having a value of 1 or 2.

Suitably, Z is oxygen or sulfur.

Suitably, R_(a′) is C₁₋₄ alkyl, halo-substituted C₁₋₄ alkyl, C₂₋₄alkenyl, C₂₋₄ alkynyl, C₃₋₇ cycloalkyl, C₅₋₇ cycloalkenyl, aryl,arylC₁₋₄ alkyl, heteroaryl, heteroarylC₁₋₄ alkyl, heterocyclyl,heterocyclylC₁₋₄ alkyl, (CR₁₀R₂₀)_(v)OR₇, (CR₁₀R₂₀)_(v)S(O)_(m)R₇,(CR₁₀R₂₀)_(v)NHS(O)₂R₇, or (CR₁₀R₂₀)_(v)NR₄R₁₄; and wherein the aryl,arylalkyl, heteroaryl, heteroaryl alkyl may be optionally substituted.

Suitably, for compounds of Formula (II), and (IIa), R₁ is Y—R_(a).

Suitably, Y is C(R_(b))(R_(d)), C(O), N(R_(d)), N(R_(d))C(R_(c))(R_(d)),oxygen, OC(R_(c))(R_(d)), S(O)m, or S(O)_(m)C(R_(c))(R_(d)).

Suitably, R_(b) is hydrogen, C₁₋₂ alkyl, NR_(c), hydroxy, thio, C₁₋₂alkoxy, S(O)_(m)C₁₋₂ alkyl.

Suitably, R_(c) is hydrogen or C₁₋₂ alkyl.

Suitably, R_(d) is hydrogen or C₁₋₂ alkyl.

Suitably, m is 0 or an integer having a value of 1 or 2.

Suitably R_(a) is an optionally substituted aryl ring or an optionallysubstituted heteroaryl ring. The optional substitutents for these ringsare the same as for the Formula (I) and (Ia) R₁ aryl and heteroarylrings as noted above.

As will be appreciated the difference between compounds of Formula (I)and (II) lies in the R₁ substitution. The remaining substituent groupsare the same and for purposes herein applicable to all four formulasunless otherwise indicated.

Suitably, R₄ and R₁₄ are each independently selected from hydrogen,optionally substituted C₁₋₄ alkyl, optionally substitutedC₃₋₇cycloalkyl, optionally substituted C₃₋₇cycloalkylC₁₋₄ alkyl,optionally substituted aryl or optionally substituted aryl-C₁₋₄ alkyl,or R₄ and R₁₄ together with the nitrogen to which they are attached mayform an optionally substituted heterocyclic ring of 4 to 7 members whichring optionally contains an additional heteroatom selected from oxygen,sulfur or NR₉.

The C₁₋₄ alkyl, C₃₋₇cycloalkyl, C₃₋₇cycloalkylC₁₋₄ alkyl, aryl andaryl-C₁₋₄ alkyl moieties may be optionally substituted, one or moretimes, preferably 1 to 4 times independently by halogen, such asfluorine, chlorine, bromine or iodine; hydroxy; hydroxy substitutedC₁₋₁₀alkyl; C₁₋₁₀ alkoxy, such as methoxy or ethoxy; halosubstitutedC₁₋₁₀ alkoxy; S(O)m alkyl, such as methyl thio, methylsulfinyl or methylsulfonyl; aldehydes (—C(O)), or a ketone, such as —C(O)R₆, such asC(O)C₁₋₁₀alkyl or C(O)aryl; amides, such as C(O)NR_(4′)R_(14′), orNR_(4′)C(O)C₁₋₁₀alkyl, or NR_(4′)C(O)aryl; NR_(4′)R_(14′), whereinR_(4′) and R_(14′) are each independently hydrogen or C₁₋₄ alkyl, orwherein the R_(4′)R_(14′) can cyclize together with the nitrogen towhich they are attached to form a 5 to 7 membered ring which optionallycontains an additional heteroatom selected from O/N/S; cyano, nitro,C₁₋₁₀ alkyl, C₃₋₇cycloalkyl, or C₃₋₇cycloalkyl C₁₋₁₀ alkyl group, suchas methyl, ethyl, propyl, isopropyl, t-butyl, etc, or cyclopropylmethyl; halosubstituted C₁₋₁₀ alkyl, such CF₂CF₂H, CH₂CF₃, or CF₃; anoptionally substituted aryl, such as phenyl, or an optionallysubstituted arylalkyl, such as benzyl or phenethyl, wherein these arylcontaining moieties may also be substituted one to two times by halogen;hydroxy; hydroxy substituted alkyl; C₁₋₁₀ alkoxy; S(O)_(m)alkyl; amino,mono & di-substituted C₁₋₄ alkyl amino, such as in the NR_(4′)R_(14′)group; C₁₋₄ alkyl, or CF₃.

When R₄ and R₁₄ together with the nitrogen cyclize to form a ring,suitably, such rings include, but are not limited to pyrrolidine,piperidine, piperazine, morpholine, and thiomorpholine (includingoxidizing the sulfur). The ring may be optional substituted, one or moretimes, preferably 1 to 4 times, independently by halogen, such asfluorine, chlorine, bromine or iodine; hydroxy; hydroxy substitutedC₁₋₁₀alkyl; C₁₋₁₀ alkoxy, such as methoxy or ethoxy; halosubstitutedC₁₋₁₀ alkoxy; S(O)m alkyl, such as methyl thio, methylsulfinyl or methylsulfonyl; a ketone on the cyclized ring (—C(O)), or a ketone or aldehydeoff the ring (—C(O)R₆), such as C(O)C₁₋₁₀ alkyl or C(O) aryl;NR_(4′)R_(14′), wherein R_(4′) and R_(14′) are each independentlyhydrogen or C₁₋₄ alkyl; C₁₋₁₀ alkyl, C₃₋₇cycloalkyl, or C₃₋₇cycloalkylC₁₋₁₀ alkyl group, such as methyl, ethyl, propyl, isopropyl, t-butyl,etc. or cyclopropyl methyl; halosubstituted C₁₋₁₀ alkyl, such CF₂CF₂H,CH₂CF₃, or CF₃; an optionally substituted aryl, such as phenyl, or anoptionally substituted arylalkyl, such as benzyl or phenethyl, whereinthese aryl containing moieties may also be substituted one to two timesby halogen; hydroxy; hydroxy substituted alkyl; C₁₋₁₀ alkoxy;S(O)_(m)alkyl; amino, mono & di-substituted C₁₋₄ alkyl amino, such as inthe NR_(4′)R_(14′) group; C₁₋₄ alkyl, or CF₃.

Suitably, R₅ is hydrogen, C₁₋₄ alkyl, C₂₋₄ alkenyl, C₂₋₄ alkynyl orNR₄R₁₄, excluding the moieties SR₅ being SNR₄R₁₄, S(O)₂R₅ being SO₂H andS(O)R₅ being SOH.

Suitably, R₆ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, heterocyclyl,heterocyclyl C₁₋₁₀alkyl, aryl, arylC₁₋₁₀ alkyl, heteroaryl orheteroarylC₁₋₁₀ alkyl, wherein these moieties may be optionallysubstituted.

Suitably, R₇ is C₁₋₆alkyl, aryl, arylC₁₋₆alkyl, heterocyclic,heterocyclylC₁₋₆ alkyl, heteroaryl, or heteroarylC₁₋₆alkyl; and whereineach of these moieties may be optionally substituted.

Suitably, R₈ is hydrogen, C₁₋₄ alkyl, halo-substituted C₁₋₄ alkyl, C₂₋₄alkenyl, C₂₋₄ alkynyl, C₃₋₇ cycloalkyl, C₅₋₇ cycloalkenyl, aryl,arylC₁₋₄ alkyl, heteroaryl, heteroarylC₁₋₄ alkyl, heterocyclyl,heterocyclylC₁₋₄ alkyl, (CR₁₀R₂₀)_(t)OR₇, (CR₁₀R₂₀)_(t)S(O)_(m)R₇,(CR₁₀R₂₀)_(t)NHS(O)₂R₇, or (CR₁₀R₂₀)_(t)NR₄R₁₄; and wherein thecycloalkyl, cycloalkenyl, aryl, arylalkyl, heteroaryl, heteroaryl alkyl,heterocyclic and heterocyclic alkyl moieties may be optionallysubstituted.

Suitably, t is an integer having a value of 1 to 3.

Suitably, R₉ is hydrogen, C(Z)R₆, optionally substituted C₁₋₁₀ alkyl,optionally substituted aryl or optionally substituted aryl-C₁₋₄ alkyl.

Suitably, R₁₀ and R₂₀ are independently selected from hydrogen or a C₁₋₄alkyl.

Suitably, R₁₁ is C₁₋₄ alkyl, halo-substituted C₁₋₄ alkyl, C₂₋₄ alkenyl,C₂₋₄ alkynyl, C₃₋₇ cycloalkyl, C₅₋₇ cycloalkenyl, aryl, arylC₁₋₄ alkyl,heteroaryl, heteroarylC₁₋₄ alkyl, heterocyclyl, heterocyclylC₁₋₄ alkyl,(CR₁₀R₂₀)_(t)OR₇, (CR₁₀R₂₀)_(t)S(O)_(m)R₇, (CR₁₀R₂₀)_(t)NHS(O)₂R₇, or(CR₁₀R₂₀)_(v)NR₄R₁₄; and wherein the aryl, arylalkyl, heteroaryl,heteroaryl alkyl, heterocyclyl, and heterocyclylalkyl moieties may beoptionally substituted.

Suitably m is 0 or an integer having a value of 1 or 2.

Suitably, R₃ is an optionally substituted C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl,C₃₋₇ cycloalkylC₁₋₁₀alkyl, aryl, arylC₁₋₁₀ alkyl, heteroarylC₁₋₁₀alkyl,or heterocyclylC₁₋₁₀ alkyl moiety, which moieties are optionallysubstituted one or more times, preferably 1 to 4 times, independently byC₁₋₁₀ alkyl, halo-substituted C₁₋₁₀ alkyl, C₂₋₁₀ alkenyl, C₂₋₁₀alkynyl,C₃₋₇cycloalkyl, C₃₋₇cycloalkylC₁₋₁₀ alkyl, C₅₋₇cycloalkenyl,C₅₋₇cycloalkenylC₁₋₁₀ alkyl, halogen, cyano, nitro, (CR₁₀R₂₀)_(n)OR₆,(CR₁₀R₂₀)_(n)SH, (CR₁₀R₂₀)_(n)S(O)_(m)R₇, (CR₁₀R₂₀)_(n)NHS(O)₂R₇,(CR₁₀R₂₀)_(n)NR₄R₁₄, (CR₁₀R₂₀)_(n)CN, (CR₁₀R₂₀)_(n)S(O)₂NR₄R₁₄,(CR₁₀R₂₀)_(n)C(Z)R₆, (CR₁₀R₂₀)_(n)OC(Z)R₆, (CR₁₀R₂₀)_(n)C(Z)OR₆,(CR₁₀R₂₀)_(n)C(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)R₆,(CR₁₀R₂₀)_(n)NR₁₀C(═NR₁₀)NR₄R₁₄, (CR₁₀R₂₀)_(n)OC(Z)NR₄R₁₄,(CR₁₀R₂₀)_(n)NR₁₀C(Z)NR₄R₁₄, or (CR₁₀R₂₀)_(n)NR₁₀C(Z)OR₇.

Preferably the optional substituents are independently selected fromhalogen, alkyl, hydroxy, alkoxy, cyano, nitro, amino, or halosubstitutedalkyl. More preferably, halogen, or alkyl.

Preferably, R₃ is an optionally substituted C₁₋₁₀ alkyl, C₃₋₇cycloalkyl,C₃₋₇cycloalkylalkyl, or aryl. More preferably, R₃ is an optionallysubstituted C₁₋₁₀ alkyl, or aryl.

Preferably, when R₃ is an aryl moiety, it is a phenyl ring, optionallysubstituted one or more times by halogen, C₁₋₄ alkyl, orhalo-substituted-C₁₋₄ alkyl. More preferably, the phenyl ring issubstituted in the 2, 4, or 6-position, or di-substituted in the2,4-position, such as 2-fluoro, 4-fluoro, 2,4-difluoro, or2-methyl-4-fluoro; or tri-substituted in the 2,4,6-position, such as2,4,6-trifluoro.

Suitably, n is 0, or an integer having a value of 1 to 10.

Suitably, X is R₂, OR₂, S(O)_(m)R₂, (CH₂)_(n)N(R₁₀)S(O)mR₂,(CH₂)_(n)N(R₁₀)C(O)R₂, (CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂. Preferably Xis R₂, OR₂, (CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂. Preferably, when X isR₂, then R₂ is the moiety X₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), orC(A₁)(A₂)(A₃).

Suitably, R₂ is independently selected from hydrogen, optionallysubstituted C₁₋₁₀ alkyl, optionally substituted C₃₋₇ cycloalkyl,optionally substituted C₃₋₇cycloalkylalkyl, optionally substituted aryl,optionally substituted arylC₁₋₁₀alkyl, optionally substitutedheteroaryl, optionally substituted heteroarylC₁₋₁₀ alkyl, optionallysubstituted heterocyclic, optionally substituted heterocyclylC₁₋₁₀alkylmoiety, or R₂ is the moiety X₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), orC(A₁)(A₂)(A₃).

The R₂ moieties, excluding hydrogen, may be optionally substituted oneor more times, preferably 1 to 4 times, independently by C₁₋₁₀ alkyl,halo-substituted C₁₋₁₀ alkyl, C₂₋₁₀ alkenyl, C₂₋₁₀ alkynyl, C₃₋₇cycloalkyl, C₃₋₇cycloalkylC₁₋₁₀alkyl, C₅₋₇cycloalkenyl, C₅₋₇cycloalkenyl C₁₋₁₀ alkyl, halogen, —C(O), cyano, nitro,(CR₁₀R₂₀)_(n)OR₆, (CR₁₀R₂₀)_(n)SH, (CR₁₀R₂₀)_(n)S(O)_(m)R₇,(CR₁₀R₂₀)_(n)NR₁₀S(O)₂R₇, (CR₁₀R₂₀)_(n)NR₄R₁₄, (CR₁₀R₂₀)_(n)CN,(CR₁₀R₂₀)_(n)S(O)₂NR₄R₁₄, (CR₁₀R₂₀)_(n)C(Z)R₆, (CR₁₀R₂₀)_(n)OC(Z)R₆,(CR₁₀R₂₀)_(n)C(Z)OR₆, (CR₁₀R₂₀)_(n)C(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)R₆,(CR₁₀R₂₀)_(n)NR₁₀C(═NR₁₀)NR₄R₁₄, (CR₁₀R₂₀)_(n)C(═NOR₆)NR₄R₁₄,(CR₁₀R₂₀)_(n)OC(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)NR₄R₁₄, or(CR₁₀R₂₀)_(n)NR₁₀C(Z)OR₇.

Suitably X₁ is N(R₁₀), O, S(O)_(m), or CR₁₀R₂₀. More preferably, X₁ isN(R₁₀), or O.

Suitably, q is 0 or an integer having a value of 1 to 10.

Suitably, A₁ is an optionally substituted C₁₋₁₀ alkyl.

Suitably, A₂ is an optionally substituted C₁₋₁₀ alkyl.

Suitably, A₃ is hydrogen or is an optionally substituted C₁₋₁₀ alkyl.

The A₁, A₂, and A₃ C₁₋₁₀ alkyl moieties may optionally substituted oneor more times, independently, preferably from 1 to 4 times, withhalogen, such as chlorine, fluorine, bromine, or iodine;halo-substituted C₁₋₁₀alkyl, such as CF₃, or CHF₂CF₃; C₂₋₁₀ alkenyl,C₂₋₁₀ alkynyl, C₃₋₇ cycloalkyl, C₃₋₇cycloalkylC₁₋₁₀alkyl,C₅₋₇cycloalkenyl, C₅₋₇ cycloalkenylC₁₋₁₀alkyl, (CR₁₀R₂₀)_(n)OR₆,(CR₁₀R₂₀)_(n)SH, (CR₁₀R₂₀)_(n)S(O)_(m)R₇, (CR₁₀R₂₀)_(n)NHS(O)₂R₇,(CR₁₀R₂₀)_(n)NR₄R₁₄, (CR₁₀R₂₀)_(n)CN, (CR₁₀R₂₀)_(n)S(O)₂NR₄R₁₄,(CR₁₀R₂₀)_(n)C(Z)R₆, (CR₁₀R₂₀)_(n)OC(Z)R₆, (CR₁₀R₂₀)_(n)C(Z)OR₆,(CR₁₀R₂₀)_(n)C(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)R₆,(CR₁₀R₂₀)_(n)NR₁₀C(═NR₁₀)NR₄R₁₄, (CR₁₀R₂₀)_(n)OC(Z)NR₄R₁₄,(CR₁₀R₂₀)_(n)NR₁₀C(Z)NR₄R₁₄, or (CR₁₀R₂₀)_(n)NR₁₀C(Z)OR₇.

Preferably, one or more of A₁ to A₃ is substituted with(CR₁₀R₂₀)_(n)OR₆. More preferably, R₆ is hydrogen.

A preferred C(A₁)(A₂)(A₃) grouping is CH(CH₂OH)₂, or C(CH₃)(CH₂OH)₂,X₁(CR₁₀R₂₀)qCH(CH₂OH)₂, or X₁(CR₁₀R₂₀)qC(CH₃)(CH₂OH)₂. X₁ is preferablyoxygen or nitrogen.

As used herein, “optionally substituted” unless specifically definedshall mean such groups as halogen, such as fluorine, chlorine, bromineor iodine; hydroxy; hydroxy substituted C₁₋₁₀alkyl; C₁₋₁₀ alkoxy, suchas methoxy or ethoxy; halosubstituted C₁₋₁₀ alkoxy; S(O)m alkyl, such asmethyl thio, methylsulfinyl or methyl sulfonyl; —C(O); NR_(4′)R_(14′),wherein R_(4′) and R_(14′) are each independently hydrogen or C₁₋₄alkyl, such as amino or mono or -disubstituted C₁₋₄ alkyl or wherein theR_(4′)R_(14′) can cyclize together with the nitrogen to which they areattached to form a 5 to 7 membered ring which optionally contains anadditional heteroatom selected from O/N/S; C₁₋₁₀ alkyl, C₃₋₇cycloalkyl,or C₃₋₇cycloalkyl C₁₋₁₀ alkyl group, such as methyl, ethyl, propyl,isopropyl, t-butyl, etc. or cyclopropyl methyl; halosubstituted C₁₋₁₀alkyl, such CF₂CF₂H, or CF₃; an optionally substituted aryl, such asphenyl, or an optionally substituted arylalkyl, such as benzyl orphenethyl, wherein these aryl containing moieties may also besubstituted one to two times by halogen; hydroxy; hydroxy substitutedalkyl; C₁₋₁₀ alkoxy; S(O)_(m)alkyl; amino, mono & di-substituted C₁₋₄alkyl amino, such as in the NR₄R₁₄ group; C₁₋₄ alkyl, or CF₃.

Suitable pharmaceutically acceptable salts are well known to thoseskilled in the art and include basic salts of inorganic and organicacids, such as hydrochloric acid, hydrobromic acid, sulphuric acid,phosphoric acid, methane sulphonic acid, ethane sulphonic acid, aceticacid, malic acid, tartaric acid, citric acid, lactic acid, oxalic acid,succinic acid, fumaric acid, maleic acid, benzoic acid, salicylic acid,phenylacetic acid and mandelic acid.

In addition, pharmaceutically acceptable salts of compounds of Formula(I) may also be formed with a pharmaceutically acceptable cation, forinstance, if a substituent group comprises a carboxy moiety. Suitablepharmaceutically acceptable cations are well known to those skilled inthe art and include alkaline, alkaline earth, ammonium and quaternaryammonium cations.

The term “halo” or “halogens” is used herein to mean the halogens,chloro, fluoro, bromo and iodo.

The term “C₁₋₁₀alkyl” or “alkyl” or “alkyl₁₋₁₀” is used herein to meanboth straight and branched chain radicals of 1 to 10 carbon atoms,unless the chain length is otherwise limited, including, but not limitedto, methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl,tert-butyl, n-pentyl and the like.

The term “cycloalkyl” is used herein to mean cyclic radicals, preferablyof 3 to 8 carbons, including but not limited to cyclopropyl,cyclopentyl, cyclohexyl, and the like.

The term “cycloalkenyl” is used herein to mean cyclic radicals,preferably of 5 to 8 carbons, which have at least one bond including butnot limited to cyclopentenyl, cyclohexenyl, and the like.

The term “alkenyl” is used herein at all occurrences to mean straight orbranched chain radical of 2-10 carbon atoms, unless the chain length islimited thereto, including, but not limited to ethenyl, 1-propenyl,2-propenyl, 2-methyl-1-propenyl, 1-butenyl, 2-butenyl and the like.

The term “aryl” is used herein to mean phenyl and naphthyl.

The term “heteroaryl” (on its own or in any combination, such as“heteroaryloxy”, or “heteroaryl alkyl”) is used herein to mean a 5-10membered aromatic ring system in which one or more rings contain one ormore heteroatoms selected from the group consisting of N, O or S, suchas, but not limited, to pyrrole, pyrazole, furan, pyran, thiophene,quinoline, isoquinoline, quinazolinyl, pyridine, pyrimidine, pyridazine,pyrazine, uracil, oxadiazole, oxazole, isoxazole, oxathiadiazole,thiazole, isothiazole, thiadiazole, tetrazole, triazole, indazole,imidazole, or benzimidazole.

The term “heterocyclic” (on its own or in any combination, such as“heterocyclylalkyl”) is used herein to mean a saturated or partiallyunsaturated 4-10 membered ring system in which one or more rings containone or more heteroatoms selected from the group consisting of N, O, S,or S(O)m, and m is 0 or an integer having a value of 1 or 2; such as,but not limited to, the saturated or partially saturated versions of theheteroaryl moieties as defined above, such as tetrahydropyrrole,tetrahydropyran, tetrahydrofuran, tetrahydrothiophene (includingoxidized versions of the sulfur moiety), pyrrolidine, piperidine,piperazine, morpholine, thiomorpholine (including oxidized versions ofthe sulfur moiety), or imidazolidine.

The term “aralkyl” or “heteroarylalkyl” or “heterocyclicalkyl” is usedherein to mean C₁₋₄ alkyl as defined above attached to an aryl,heteroaryl or heterocyclic moiety as also defined herein unlessotherwise indicate.

The term “sulfonyl” is used herein to mean the oxide S(O) of thecorresponding sulfide, the term “thio” refers to the sulfide, and theterm “sulfonyl” refers to the fully oxidized S(O)₂ moiety.

The term “aroyl” is used herein to mean C(O)Ar, wherein Ar is as phenyl,naphthyl, or aryl alkyl derivative such as defined above, such groupinclude but are not limited to benzyl and phenethyl. The term “alkanoyl”is used herein to mean C(O)C₁₋₁₀ alkyl wherein the alkyl is as definedabove.

It is recognized that the compounds of the present invention may existas stereoisomers, regioisomers, or diastereiomers. These compounds maycontain one or more asymmetric carbon atoms and may exist in racemic andoptically active forms. All of these individual compounds, isomers, andmixtures thereof are included within the scope of the present invention.

Exemplified compounds of the compounds of this invention include theracemates, or optically active forms of the compounds of the workingexamples herein, and pharmaceutically acceptable salts thereof.

Methods of Manufacture

The compounds of Formula (I), (Ia), (II) and (IIa) may be obtained byapplying synthetic procedures, described herein. The synthesis providedfor is applicable to producing compounds of Formula (I), (Ia), (II) and(IIa) having a variety of different R₁, R₂, Y, X, and R₃ groups whichare reacted, employing optional substituents which are suitablyprotected, to achieve compatibility with the reactions outlined herein.Subsequent deprotection, in those cases, then affords compounds of thenature generally disclosed. While a particular formula with particularsubstituent groups is shown herein, the synthesis is applicable to allformulas and all substituent groups herein.

Once the nucleus has been established, further compounds of Formula (I),(Ia), (II) and (IIa) may be prepared by applying standard techniques forfunctional group interconversion, well known in the art. For instance:C(O)NR₄R₁₄ from CO₂CH₃ by heating with HNR₄R₁₄ in CH₃OH with or withoutcatalytic or stoichiometric metal cyanide or Aluminum trimethyl, e.g.NaCN; OC(O)R₃ from OH with e.g., ClC(O)R₆ in bases such as triethylamineand pyridine; NR₁₀—C(S)NR₄R₁₄ from NHR₁₀ with an alkylisothiocyanate, orthiocyanic acid and ClC(S)NR₄R₁₄; NR₁₀C(O)OR₆ from NHR₁₀ with an alkylor aryl chloroformate; NR₁₀C(O)NR₄H from NHR₁₀ by treatment with anisocyanate, e.g. R₄N═C═O; NR₁₀—C(O)R₆ from NHR₁₀ by treatment withCl—C(O)R₆ in pyridine; C(═NR₁₀)NR₄R₁₄ from C(NR₄R₁₄)S with H₃NR₁₀ ⁺OAc⁻by heating in alcohol; C(NR₄R₁₄)SR₆ from C(S)NR₄R₁₄ with R₆—I in aninert solvent, e.g. acetone; NR₁₀SO₂R₇ from NHR₁₀ by treatment withClSO₂R₇ by heating in bases such as pyridine; NR₁₀C(S)R₆ from NR₁₀C(O)R₆by treatment with Lawesson's reagent[2,4-bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide];NR₁₀SO₂CF₃ from NHR₁₀ with triflic anhydride and base wherein R₃, R₆,R₁₀, R₄ and R₁₄ are as defined in Formula (I) herein.

Precursors of the groups R₁, R₂ and R₃, can be other R₁, R₂ and R₃, etc.groups that may be interconverted by applying standard techniques forfunctional group interconversion. For example wherein a moiety is a halosubstituted C₁₋₁₀ alkyl can be converted to the corresponding C₁₋₁₀alkylN₃ derivative by reacting with a suitable azide salt, andthereafter if desired can be reduced to the corresponding C₁₋₁₀alkylNH₂compound, which in turn can be reacted with R₇S(O)₂X wherein X is halo(e.g., chloro) to yield the corresponding C₁₋₁₀alkylNHS(O)₂R₇ compound.

Alternatively wherein the moiety is a halo-substituted C₁₋₁₀-alkyl itcan be reacted with an amine R₄R₁₄NH to yield the correspondingC₁₋₁₀-alkylNR₄R₁₄ compound, or can be reacted with an alkali metal saltof R₇SH to yield the corresponding C₁₋₁₀alkylSR₇ compound.

As noted above, it may be desirable during the synthesis of thecompounds of this invention, to derivatize reactive functional groups inthe molecule undergoing reaction so as to avoid unwanted side reactions.Functional groups such as hydroxy, amino, an acid groups typically areprotected with suitable groups that can be readily removed when desired.Suitable common protecting groups for use with hydroxyl groups andnitrogen groups are well known in the art and described in manyreferences, for instance, Protecting Groups in Organic Synthesis, Greeneet al., John Wiley & Sons, New York, N.Y., (2nd edition, 1991 or theearlier 1981 version). Suitable examples of hydroxyl protecting groupsinclude ether forming groups such as benzyl, and aryl groups such astert-butoxycarbonyl (Boc), silyl ethers, such as t-butyldimethyl ort-butyldiphenyl, and alkyl ethers, such as methyl connected by an alkylchain of variable link, (CR₁₀R₂₀)_(n). Amino protecting groups mayinclude benzyl, aryl such as acetyl and trialkylsilyl groups. Carboxylicacid groups are typically protected by conversion to an ester that caneasily be hydrolyzed, for example, trichloethyl, tert-butyl, benzyl andthe like.

Pharmaceutically acid addition salts of compounds of Formula (I), (Ia),(II) and (IIa) may be obtained in known manner, for example by treatmentthereof with an appropriate amount of acid in the presence of a suitablesolvent.

An illustration of the preparation of compounds of the present inventionis shown in the scheme below. For purposes herein, the compounds inSchemes I and II are shown with an S-methyl, or S(O)₂-methyl group whichis deemed representative of the S(O)m-Rg group, as described in theformulas below.

The starting material 1-Scheme I may be obtained from the commerciallyavailable 4,6-dihydroxy-2-methylmercaptopyrimidine by known literatureprocedures, such as those noted in Santilli et al., J. Heterocycl. Chem.(1971), 445-53, wherein POCl₃ and DMF are used.

The intermediate 2-Scheme I was produced by two different routes. In thefirst route, coupling of dichloro aldehyde 1-Scheme I with aryl aminesin the presence of NaH in DMSO (Santilli et al., J. Heterocycl. Chem.(1971), 445-53) afforded the desired compound 2-Scheme I along withimine 13-Scheme I. The imine was converted to aldehyde 2-Scheme I bytreatment with aqueous HCl in THF. Conversion of 1-Scheme I to 2-SchemeI may also be achieved using triethylamine and the desired amine inchloroform at room temperature for 10 minutes. The reaction was veryeffective for a range of alkyl amines (78-95% yield). For aryl amines,elevated temperatures (reflux) and longer reaction time (24 hours) werenecessary for reaction completion. Use of the base could be omitted when3 or more equivalent of amine were used. Other suitable bases, includebut are not limited to pyridine, diisopropyl ethylamine or pyrrolidine,which may also be used in an appropriate organic solvent, including butnot limited to THF, diethyl ether or dioxane.

In the second route, the nitrile 9-Scheme I was prepared in three stepsfrom the aldehyde 1-Scheme I (Santilli et al., J. Heterocycl. Chem.(1971), 445-53). Coupling of dichloro nitrile 9-Scheme I with arylamines in the presence of NaH in DMSO afforded the desired compound10-Scheme I. Other suitable bases such as pyridine, diisopropylethylamine, or sodium may also be used in an appropriate organic solventsuch as THF, DMF or dioxane. Production and use of the nitrile9-Scheme-I may also be found in PCT/US01106688, filed Mar. 2, 2001 whosedisclosure is incorporated herein by reference in its entirety.

The nitrile 10-Scheme I was easily reduced with DIBAL in dichloromethaneat room temperature (Boschelliat et al., J. Med. Chem. (1998),4365-4377) to afford desired 2-Scheme I along with the unsubstitutedimine 13-Scheme I (R═H). The latter was hydrolyzed to 2-Scheme I in situwith HCl. Other reduction agents, such as lithium aluminum hydride,Raney Ni, or SnCl₂, may be utilized in an appropriate organic solventsuch as THF, diethyl ether or dioxane to perform the conversion of10-Scheme I to 2-Scheme I.

Aldehyde 2-Scheme I was coupled to arylboronic acids under Suzukicoupling conditions, using a palladium catalyst, such astetrakis(triphenylphosphine)palladium(0), to afford good to excellentyields of 3-Scheme I. Alternatively, the bi-aryl coupling reaction of2-Scheme I may be performed using aryl or heteroaryl organozinc,organocopper, organotin, or other organometallic reagents known toafford bi-aryl cross-coupling products such as 3-Scheme I [see forexample Solberg, J.; Undheim, K. Acta Chemica Scandinavia 1989, 62-68].Displacement of the chlorine in 2-Scheme I may also be achieved withnitrogen nucleophiles [for related aminations see U.S. Pat. Nos.3,631,045 and 3,910,913], sulphur nucleophiles, [see Tumkevicius, S.Liebigs Ann. 1995, 1703-1705], oxygen nucleophiles, or alkylnucleophiles.

3-Scheme I was then converted to pyridopyrimidinone 5-Scheme I by one ofthree procedures. The first procedure used the Wittig reaction, asmodified by Homer-Emmons, converting 3-Scheme I to 4-Scheme I. In thisreaction, the aldehyde 3-Scheme I was treated with a suitable phosphorusylide, such as triethyl phosphonoacetate or methyldiethylphosphonoacetate, to give the olefin intermediate 4-Scheme I. Thereaction was performed under reflux, in a suitable base, such as sodiumhydride, sodium methoxide, or sodium hydroxide, and in a suitableorganic solvent such as diethyl ether, dioxane or ethanol. Theconversion of 3-Scheme I to 4-Scheme I may also be performed using thePeterson olefination reaction, or an aldol-based olefination reactionthat utilizes acetic anhydride, malonic acid and its monoalkyl esters,or ethyl acetate.

Heating of 4-Scheme I in toluene at 220° C. in a sealed tube (Matyus etal. Heterocycles (1985), 2057-64), followed by solvent removal, affordedthe desired product 5-Scheme I. This reaction may be run in the presenceof a suitable base, such as DBU or diisopropylethyl amine, pyridine,lithium bi(trimethylsilyl)amide, or LDA and in an appropriate organicsolvent such as an organic hydrocarbon, cresol, dioxane, DMF, pyridine,or xylene.

The second procedure used a Horner-Emmons reaction with Stillmodification (Still et al., Tetrahedron Lett. (1983), 4405-8; Jacobsenet al., Tetrahedron (1994), 4323-34) to produce a mixture of desiredproduct 5-Scheme I and trans isomer 4-Scheme I. Trans isomer 4-Scheme Iwas isolated and converted to the desired product 5-Scheme I by heatingto 220° C. in toluene in a sealed tube as described above.

The third procedure involved acetylation of 3-Scheme I, followed by theintramolecular aldol condensation, promoted by an acetylating agent(such as acetic anhydride, acetyl chloride, or a ketene) and a suitablebase (such as pyridine, diispropyl ethylamine, or pyrrolidine), togenerate 5-Scheme I in a very good yield. The third procedure is optimalwhen R₃ is an optionally substituted aryl, or heteroaryl. When R₃ is anarylalkyl, or heteroarylalkyl substituent it is not clear that thereaction will form the key intermediate of Formula (VII), as shown below(3a-Scheme II), which may optionally be isolated, as shown in Scheme IIbelow. Compounds of Formula (VII) are preferably not isolated butfurther reacted with a base or with heat to cyclize into 5-Scheme-I. Thefirst and second procedures should be utilized for all other R₃moieties.

Oxidation of the sulfide 5-Scheme I to the sulfone 6-Scheme I wasperformed using meta-chloroperoxybenzoic acid (mCPBA) in high yield andpurity. Suitable oxidation methods for use herein include use of one ortwo equivalents of meta-chloroperoxybenzoic acid (mCPBA) or Oxone® toafford either the sulfoxides or sulfones. Oxidation of the sulfides tosulfoxides or sulfones can also be effected by OsO₄ and catalytictertiary amine N-oxide, hydrogen peroxide, other peracids, oxygen,ozone, organic peroxides, potassium and zinc permanganate, potassiumpersulfate, and sodium hypochlorite.

Displacements of the sulfones 6-Scheme I to the final products7-Scheme-I were usually done with an excess of amine inN-methylpyrrolidine (Barvian et al., J. Med. Chem. (2000), 4606-4616). Awide range of primary amines underwent this reaction with excellentyields. In some cases (in O-displacement or sulfonamide formation) ananion of the nucleophile was prepared with base (usually sodium hydride)in dimethylformamide and then added to the sulfone. Yields for thesereactions were usually lower. Similarly related sulfones and sulfoxidesof the compounds herein wherein X is SO-alkyl or SO₂-alkyl have beenreported in the literature to be displaced by a wide variety ofnucleophiles. Thus the analogs of the compounds herein wherein X is analkyl sulfone or sulfoxide may be displaced by primary and secondaryalkylamines without additional base catalysis, preferably in a polaraprotic solvent, such as but not limited to, N-methyl pyrrolidin-2-one(NMP), and at varying temperatures depending upon the nucleophilicity ofthe amine. For instance displacement of the sulfone of analogs ofFormula (I) compounds with ethanolamine, in NMP, occurred in 30 min. at65° C., while a more hindered amine such astris(hydroxymethyl)-aminomethane may require elevated temperatures andextended reaction times (80° C. over a 24 hour reaction time). Thesulfone may also be displaced with a substituted arylamine, orheteroarylamine at elevated temperatures, sometimes requiring formationof the aryl or heteroarylamine anion with sodium hydride, or othersuitable base, in DMSO. In addition, the sulfoxide analogs of Formula(I) compounds may be readily displaced with aluminum salts of aryl orheteroaryl amines as previously described in the patent literature (WO99/32121). Likewise, sulfone and sulfoxide analogs of Formula (I) and(Ia) may be displaced with aryl or heteroaryl or alkyl thiols or alkylor aryl or heteroaryl alcohols. For instance analogs of (I) containingsulfones as the X substituents may be displaced with sodium alkoxide inthe alcohol, or alternatively reactive alkoxide or phenoxidenucleophiles may be generated from the alcohol or phenol with a suitablebase such as sodium, NaH or sodium bistrimethylsilyl amide in a polaraprotic solvent such as DMSO, or run as a neat reaction. Similarlysulfones related to Formula (I) and (Ia), for instance, may be displacedwith carbon nucleophiles such as aryl or alkyl Grignard reagents orrelated organometallics such as organo lithium, zinc, tin or boron.These reactions may, in some cases, require transition metal catalysissuch as with Pd or Ni catalysts. Displacement of related 2-pyrimidinesulfones with cyanide, malonate anions, unactivated enolates, orheterocyclic C nucleophiles such as 1-methylimidazole anion, by thegeneration of the anion with NaH or other suitable base in THF also hasprecedent (see for example, Chem Pharm Bull. 1987, 4972-4976.). Forexample, analogs of Formula (I) and (Ia) compounds wherein X is an alkylsulfone may be displaced with the anion of 1-methyl imidazole, generatedby treatment of 1-methyl imidazole with n-butyl lithium in a solventsuch as THF at temperatures of about −70°, to afford the C-alkylatedproduct substituted on the imidazole C-2.

For the purposes herein, compounds of Formulas (I), (Ia), (II) and (IIa)wherein X is R₂ or NHS(O)mR₂ may be obtained from compounds of 6-SchemeI by displacement of the sulfone using the appropriate “X” functionalityas defined in Formula (I) and (Ia). To obtain compounds of Formulas (I),(Ia), (II) and (IIa) wherein X is S(O)_(m)R₂ and R₂ is other thanmethyl, displacement of the sulfone on the corresponding compound6-Scheme I by thiol (R₂SH) and then followed by oxidation, if desired,with an appropriate oxidating agent, such as MCPBA, or KMnO₄. Suitableoxidation methods for use herein include use of an oxidant such as oneor two equivalents of meta-chloroperoxybenzoic acid or Oxone® to affordeither the sulfoxides or sulfones. Oxidation of the sulfides to sulfonesmay also be effected by OsO₄ and catalytic tertiary amine N-oxide. Othermethods for sulfide oxidation include the use of hydrogen peroxide,other peracids, oxygen, ozone, organic peroxides, potassium and zincpermanganate, potassium persulfate, and sodium hypochlorite.

8-Scheme I can be also prepared by heating the trans ester 4-Scheme I inalcohol in the presence of the corresponding sodium alkoxide. The yieldof this reaction was very high for primary alcohols, but longer reactiontimes were required for secondary alcohols. Sodium alkoxides may beeasily prepared from corresponding alcohol and base, such as sodium orsodium hydride.

Reduction of trans ester 4-Scheme I with SmI₂ gives the reduced analogue11-Scheme I. This reduction can be also done in the presence of otherreducing agents such as hydrogen gas, lithium in liquid ammonia,magnesium or sodium borohydride in the appropriate organic solvent suchas THF, ethanol or diethyl ether.

Cyclization of the ester 11-Scheme I can be done utilizing sodiummethoxide in methanol to give reduced analogue 12-Scheme I. Otherorganic bases, such as sodium, sodium ethoxide or TEA can be used in anappropriate organic solvent such as methanol, ethanol or dioxane. Theproduct 12-Scheme I can be also obtained by heating ester 11-Scheme I to150° C. in an appropriate organic solvent, such as toluene, xylene orisopropanol.

Additional procedures for producing similar intermediates to thoseherein, which the skilled artisan may find may be found in WO 99/41253,now U.S. Pat. No. 6,200,977; U.S. Pat. No. 6,153,619; U.S. Pat. No.6,268,310; U.S. Pat. No. 5,468,751; U.S. Pat. No. 5,474,996; and EP 1040 831.

An illustration of an alternative preparation of compounds of Formula(VII) the present invention is shown in Scheme II below, and describedabove.

Another aspect of the present invention are novel intermediates of theformula (III)

wherein

-   R₁ is an aryl or heteroaryl ring, which ring is optionally    substituted;-   R₃ is an C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylalkyl, aryl,    arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl, heterocyclic, or    a heterocyclylC₁₋₁₀ alkyl moiety, which moieties are optionally    substituted;-   R₁₂ is a C₁₋₁₀ alkyl, aryl, heteroaryl, or arylalkyl;-   m is 0 or an integer having a value of 1 or 2; and-   Rg is a C₁₋₄ alkyl.

Preferably, Rg is a C₁₋₄ alkyl, and more preferably methyl.

Preferably, m is 0 or an integer having a value of 1 or 2. Morepreferably m is 0 or 2.

Preferably, R₁ is an aryl moiety, more preferably a phenyl ring,optionally substituted one or more times by halogen, C₁₋₄ alkyl, orhalo-substituted-C₁₋₄ alkyl. More preferably, the phenyl ring issubstituted in the 2, 4, or 6-positions, or di-substituted in the2,4-positions, such as 2-fluoro, 4-fluoro, 2,4-difluoro,2,4,6-trifluoro, or 2-methyl-4-fluoro.

Another aspect of the present invention are novel intermediates of theformula (IIIa)

wherein

-   R₁ is the moiety YRa;-   Y is C(R_(b))(R_(d)), C(O), N(R_(d)), N(R_(d))C(R_(c))(R_(d)),    oxygen, OC(R_(c))(R_(d)), S(O)m, or S(O)_(m)C(R_(c))(R_(d));-   R_(a) is an aryl or heteroaryl ring, which ring is optionally    substituted;-   R_(b) is hydrogen, C₁₋₂ alkyl, NR_(c), hydroxy, thio, C₁₋₂ alkoxy,    S(O)_(m)C₁₋₂ alkyl;-   R_(c) is hydrogen or C₁₋₂ alkyl;-   R_(d) is hydrogen or C₁₋₂ alkyl;-   m is 0 or an integer having a value of 1 or 2; and-   R₃ is an C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylalkyl, aryl,    arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl, heterocyclic, or    a heterocyclylC₁₋₁₀ alkyl moiety, which moieties are optionally    substituted;-   R₁₂ is a C₁₋₁₀ alkyl, aryl, heteroaryl, or arylalkyl;-   m is 0 or an integer having a value of 1 or 2; and-   Rg is a C₁₋₄ alkyl.

The substituents of compounds of Formula (III) and (IIIa), and (IV) and(IVa) below follow those preferences of the final compounds of Formula(I) or (II) herein, respectively.

Another aspect of the present invention are novel intermediates of theformula (IV)

wherein R₁, R₃, R₁₂, m and R_(g) are as defined for Formula (III) above.

Another aspect of the present invention are novel intermediates of theformula (IVa)

wherein R₁, R₃, R₁₂, m and R_(g) are as defined for Formula (IIIa)above.

Another aspect of the present invention are novel intermediates of theformula (IV)

wherein R₁, R₃, R₁₂, m and R_(g) are as defined for Formula (III) above.

Another aspect of the present invention are novel intermediates of theformula (IVa)

wherein R₁, R₃, R₁₂, Rg and m are as defined for Formula (IIIa) above.

Another aspect of the present invention are novel intermediates of theformula

wherein

-   R₁ is a halogen, an optionally substituted aryl or an optionally    substituted heteroaryl ring;-   R₃ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylalkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are optionally substituted; provided that when R₃ is hydrogen, then    R₁ is other than chlorine;-   m is 0 or an integer having a value of 1 or 2; and-   Rg is a C₁₋₄ alkyl.

Preferably, R₁ is a halogen, more preferably chlorine, or an arylmoiety, more preferably a phenyl ring, optionally substituted one ormore times by halogen, C₁₋₄ alkyl, or halo-substituted-C₁₋₄ alkyl. Morepreferably, the phenyl ring is substituted in the 2, 4, or 6-positions,or di-substituted in the 2,4-positions, such as 2-fluoro, 4-fluoro,2,4-difluoro, 2,4,6-trifluoro, or 2-methyl-4-fluoro.

Preferably, R₃ is an optionally substituted C₁₋₁₀ alkyl, C₃₋₇cycloalkyl, C₃₋₇ cycloalkylalkyl, or aryl.

Preferably, the R₃ optional substituents are independently selected fromC₁₋₁₀ alkyl, halo-substituted C₁₋₁₀ alkyl, C₂₋₁₀ alkenyl, C₂₋₁₀ alkynyl,C₃₋₇ cycloalkyl, C₃₋₇cycloalkylC₁₋₁₀ alkyl, C₅₋₇ cycloalkenyl, C₅₋₇cycloalkenyl C₁₋₁₀ alkyl, halogen, (CR₁₀R₂₀)_(n)OR₆, (CR₁₀R₂₀)_(n)SH,(CR₁₀R₂₀)_(n)S(O)_(m)R₇, (CR₁₀R₂₀)_(n)NHS(O)₂R₇, (CR₁₀R₂₀)_(n)NR₄R₁₄,(CR₁₀R₂₀)_(n)CN, (CR₁₀R₂₀)_(n)S(O)₂NR₄R₁₄, (CR₁₀R₂₀)_(n)C(Z)R₆,(CR₁₀R₂₀)_(n)OC(Z)R₆, (CR₁₀R₂₀)_(n)C(Z)OR₆, (CR₁₀R₂₀)_(n)C(Z)NR₄R₁₄,(CR₁₀R₂₀)_(n)NR₁₀C(Z)R₆, (CR₁₀R₂₀)_(n)NR₁₀C(═NR₁₀)NR₄R₁₄,(CR₁₀R₂₀)_(n)OC(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)NR₄R₁₄, or(CR₁₀R₂₀)_(n)NR₁₀C(Z)OR₇.

More preferably, the optional substituents are independently selectedfrom halogen, alkyl, hydroxy, alkoxy, amino, or halosubstituted alkyl.

Exemplified compounds of Formula (VI) include, but are not limited to:

-   4-Chloro-2-methylsulfanyl-6-phenylamino-pyrimidine-5-carbaldehyde;-   4-Chloro-6-(2,6-difluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-6-cyclopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-6-(cyclopropylmethyl-amino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   2-Methylsulfanyl-4-phenyl-6-phenylamino-pyrimidine-5-carbaldehyde;-   4-(2-Chlorophenyl)-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(2-Chlorophenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(2-Fluorophenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(2-Fluoro-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Chloro-2-methylsulfanyl-6-cyclohexylaminopyrimidine-5-carboxaldehyde;-   2-Methylsulfanyl-4-(2-methyl-4-fluorophenyl)-6-cyclohexylaminopyrimidine-5-carbaldehyde;-   4-Amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Cyclopropylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(Cyclopropylmethyl-amino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(2,6-Difluoro-phenylamino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(2-Fluorophenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-sec-Butylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(4-Fluoro-2-methyl-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Cyclopropylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(Cyclopropylmethyl-amino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(4-Fluoro-2-methyl-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-sec-Butylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-Amino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-sec-Butylamino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(2,6-Difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   4-(1-Ethylpropylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde;-   2-Methylsulfanyl-4-(2-methyl-4-fluorophenyl)-6-cyclohexylaminopyrimidine-5-carbaldehyde;    and-   4-Chloro-2-methylsulfanyl-6-cyclohexylaminopyrimidine-5-carboxaldehyde.

Another aspect of the present invention are novel intermediates of theformula

wherein

-   R₁ is YRa;-   Y is C(R_(b))(R_(d)), C(O), N(R_(d)), N(R_(d))C(R_(c))(R_(d)),    oxygen, OC(R_(c))(R_(d)), S(O)m, or S(O)_(m)C(R_(c))(R_(d));-   R_(a) is an aryl or heteroaryl ring, which ring is optionally    substituted;-   R_(b) is hydrogen, C₁₋₂ alkyl, NR_(c), hydroxy, thio, C₁₋₂ alkoxy,    S(O)_(m)C₁₋₂ alkyl;-   R_(c) is hydrogen or C₁₋₂ alkyl;-   R_(d) is hydrogen or C₁₋₂ alkyl;-   m is 0 or an integer having a value of 1 or 2; and-   R₃ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylalkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are optionally substituted;-   m is 0 or an integer having a value of 1 or 2; and-   Rg is a C₁₋₄ alkyl.

Preferably, as noted above, the substituents of compounds of Formula(VI) and (VIa) follow those of the final compounds of Formula (I), and(II) herein.

Exemplified compounds of Formula (VI) include, but are not limited to,4-(2-Chloro-phenylamino)-2-methylsulfanyl-6-phenoxy-pyrimidine-5-carbaldehyde.

Another aspect of this invention are novel intermediates of Formula(VII)

wherein

R₁ is as defined above for Formula (I) compounds, and R₃, Rg, and m isan optionally substituted aryl or heteroaryl moiety, as defined forFormula (III) compounds.

Another aspect of this invention are novel intermediates of Formula(VIIa)

wherein

R₁ is defined above for Formula (II) compounds, and R₃, Rg, and m is anoptionally substituted aryl or heteroaryl moiety, as defined for Formula(IIIa) compounds.

Another aspect of the present invention are novel intermediates of theformula

wherein

-   R₁ is a halogen;-   R₃ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃.₇ cycloalkylalkyl,    aryl, arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl,    heterocyclic, or a heterocyclylC₁₋₁₀ alkyl moiety, which moieties    are optionally substituted; provided that when R₃ is hydrogen, then    R₁ is other than chlorine;-   m is 0 or an integer having a value of 1 or 2; and-   Rg is a C₁₋₄ alkyl.

Preferably R₁ is a halogen, more preferably chlorine.

Suitably, the R₃ substituents are the same as those for compounds ofFormulas (I) and (II) herein.

Methods of Treatment

The compounds of Formula (I) and (Ia) or a pharmaceutically acceptablesalt thereof can be used in the manufacture of a medicament for theprophylactic or therapeutic treatment of any disease state in a human,or other mammal, which is exacerbated or caused by excessive orunregulated cytokine production by such mammal's cell, such as but notlimited to monocytes and/or macrophages.

For purposes herein, compounds of Formula (I) and (Ia) will all bereferred to as compounds of Formula (I) unless otherwise indicated.

Compounds of Formula (I) are capable of inhibiting proinflammatorycytokines, such as IL-1, IL-6, IL-8, and TNF and are therefore of use intherapy. IL-1, IL-6, IL-8 and TNF affect a wide variety of cells andtissues and these cytokines, as well as other leukocyte-derivedcytokines, are important and critical inflammatory mediators of a widevariety of disease states and conditions. The inhibition of thesepro-inflammatory cytokines is of benefit in controlling, reducing andalleviating many of these disease states.

Accordingly, the present invention provides a method of treating acytokine-mediated disease which comprises administering an effectivecytokine-interfering amount of a compound of Formula (I) or apharmaceutically acceptable salt thereof.

Compounds of Formula (I) are capable of inhibiting inducibleproinflammatory proteins, such as COX-2, also referred to by many othernames such as prostaglandin endoperoxide synthase-2 (PGHS-2) and aretherefore of use in therapy. These proinflammatory lipid mediators ofthe cyclooxygenase (CO) pathway are produced by the inducible COX-2enzyme. Regulation, therefore of COX-2 which is responsible for thethese products derived from arachidonic acid, such as prostaglandinsaffect a wide variety of cells and tissues are important and criticalinflammatory mediators of a wide variety of disease states andconditions. Expression of COX-1 is not effected by compounds of Formula(I). This selective inhibition of COX-2 may alleviate or spareulcerogenic liability associated with inhibition of COX-1 therebyinhibiting prostoglandins essential for cytoprotective effects. Thusinhibition of these pro-inflammatory mediators is of benefit incontrolling, reducing and alleviating many of these disease states. Mostnotably these inflammatory mediators, in particular prostaglandins, havebeen implicated in pain, such as in the sensitization of pain receptors,or edema. This aspect of pain management therefore includes treatment ofneuromuscular pain, headache, cancer pain, and arthritis pain. Compoundsof Formula (I) or a pharmaceutically acceptable salt thereof, are of usein the prophylaxis or therapy in a human, or other mammal, by inhibitionof the synthesis of the COX-2 enzyme.

Accordingly, the present invention provides a method of inhibiting thesynthesis of COX-2 which comprises administering an effective amount ofa compound of Formula (I) or a pharmaceutically acceptable salt thereof.The present invention also provides for a method of prophylaxistreatment in a human, or other mammal, by inhibition of the synthesis ofthe COX-2 enzyme.

In particular, compounds of Formula (I) or a pharmaceutically acceptablesalt thereof are of use in the prophylaxis or therapy of any diseasestate in a human, or other mammal, which is exacerbated by or caused byexcessive or unregulated IL-1, IL-6, IL-8 or TNF production by suchmammal's cell, such as, but not limited to, monocytes and/ormacrophages.

Accordingly, in another aspect, this invention relates to a method ofinhibiting the production of IL-1 in a mammal in need thereof whichcomprises administering to said mammal an effective amount of a compoundof Formula (I) or a pharmaceutically acceptable salt thereof.

There are many disease states in which excessive or unregulated IL-1production is implicated in exacerbating and/or causing the disease.These include rheumatoid arthritis, osteoarthritis, meningitis, ischemicand hemorrhagic stroke, neurotrauma/closed head injury, stroke,endotoxemia and/or toxic shock syndrome, other acute or chronicinflammatory disease states such as the inflammatory reaction induced byendotoxin or inflammatory bowel disease, tuberculosis, atherosclerosis,muscle degeneration, multiple sclerosis, cachexia, bone resorption,psoriatic arthritis, Reiter's syndrome, gout, traumatic arthritis,rubella arthritis and acute synovitis. Recent evidence also links IL-1activity to diabetes, pancreatic β cell diseases and Alzheimer'sdisease.

Use of a CSAID inhibitor compound for the treatment of CSBP mediateddisease states, can include, but not be limited to neurodegenerativediseases, such as Alzheimer's disease (as noted above), Parkinson'sdisease and multiple sclerosis, etc.

In a further aspect, this invention relates to a method of inhibitingthe production of TNF in a mammal in need thereof which comprisesadministering to said mammal an effective amount of a compound ofFormula (I) or a pharmaceutically acceptable salt thereof.

Excessive or unregulated TNF production has been implicated in mediatingor exacerbating a number of diseases including rheumatoid arthritis,rheumatoid spondylitis, osteoarthritis, gouty arthritis and otherarthritic conditions, sepsis, septic shock, endotoxic shock, gramnegative sepsis, toxic shock syndrome, adult respiratory distresssyndrome, chronic pulmonary inflammatory disease and chronic obstructivepulmonary disease, silicosis, pulmonary sarcoisosis, bone resorptiondiseases, such as osteoporosis, cardiac, brain and renal reperfusioninjury, graft vs. host reaction, allograft rejections, fever andmyalgias due to infection, such as influenza, brain infections includingencephalitis (including HIV-induced forms), cerebral malaria,meningitis, ischemic and hemorrhagic stroke, cachexia secondary toinfection or malignancy, cachexia secondary to acquired immunedeficiency syndrome (AIDS), AIDS, ARC (AIDS related complex), keloidformation, scar tissue formation, inflammatory bowel disease, Crohn'sdisease, ulcerative colitis and pyresis.

Compounds of Formula (I) are also useful in the treatment of viralinfections, where such viruses are sensitive to upregulation by TNF orwill elicit TNF production in vivo. The viruses contemplated fortreatment herein are those that produce TNF as a result of infection, orthose which are sensitive to inhibition, such as by decreasedreplication, directly or indirectly, by the TNF inhibiting-compounds ofFormula (1). Such viruses include, but are not limited to HIV-1, HIV-2and HIV-3, Cytomegalovirus (CMV), Influenza, adenovirus and the Herpesgroup of viruses, such as but not limited to, Herpes Zoster and HerpesSimplex. Accordingly, in a further aspect, this invention relates to amethod of treating a mammal afflicted with a human immunodeficiencyvirus (HIV) which comprises administering to such mammal an effectiveTNF inhibiting amount of a compound of Formula (I) or a pharmaceuticallyacceptable salt thereof.

It is also recognized that both IL-6 and IL-8 are produced duringrhinovirus (HRV) infections and contribute to the pathogenesis of commoncold and exacerbation of asthma associated with HRV infection (Turner etal. (1998), Clin. Infec. Dis., Vol 26, p 840; Teren et al. (1997), Am JRespir Crit Care Med vol 155, p 1362; Grunberg et al. (1997), Am JRespir Crit Care Med 156:609 and Zhu et al, J Clin Invest (1996),97:421). It has also been demonstrated in vitro that infection ofpulmonary epithelial cells with HRV results in production of IL-6 andIL-8 (Subauste et al., J. Clin. Invest. 1995, 96:549.) Epithelial cellsrepresent the primary site of infection of HRV. Therefore another aspectof the present invention is a method of treatment to reduce inflammationassociated with a rhinovirus infection, not necessarily a direct effecton virus itself.

Compounds of Formula (I) may also be used in association with theveterinary treatment of mammals, other than in humans, in need ofinhibition of TNF production. TNF mediated diseases for treatment,therapeutically or prophylactically, in animals include disease statessuch as those noted above, but in particular viral infections. Examplesof such viruses include, but are not limited to, lentivirus infectionssuch as, equine infectious anaemia virus, caprine arthritis virus, visnavirus, or maedi virus or retrovirus infections, such as but not limitedto feline immunodeficiency virus (FIV), bovine immunodeficiency virus,or canine immunodeficiency virus or other retroviral infections.

The compounds of Formula (I) may also be used topically in the treatmentor prophylaxis of topical disease states mediated by or exacerbated byexcessive cytokine production, such as by IL-1 or TNF respectively, suchas inflamed joints, eczema, psoriasis and other inflammatory skinconditions such as sunburn; inflammatory eye conditions includingconjunctivitis; pyresis, pain and other conditions associated withinflammation. Periodontal disease has also been implemented in cytokineproduction, both topically and systemically. Hence use of compounds ofFormula (I) to control the inflammation associated with cytokineproduction in such peroral diseases such as gingivitis and periodontitisis another aspect of the present invention.

Compounds of Formula (I) have also been shown to inhibit the productionof IL-8 (Interleukin-8, NAP). Accordingly, in a further aspect, thisinvention relates to a method of inhibiting the production of IL-8 in amammal in need thereof which comprises administering to said mammal aneffective amount of a compound of Formula (I) or a pharmaceuticallyacceptable salt thereof.

There are many disease states in which excessive or unregulated IL-8production is implicated in exacerbating and/or causing the disease.These diseases are characterized by massive neutrophil infiltration suchas, psoriasis, inflammatory bowel disease, asthma, cardiac, brain andrenal reperfusion injury, adult respiratory distress syndrome,thrombosis and glomerulonephritis. All of these diseases are associatedwith increased IL-8 production which is responsible for the chemotaxisof neutrophils into the inflammatory site. In contrast to otherinflammatory cytokines (IL-1, TNF, and IL-6), IL-8 has the uniqueproperty of promoting neutrophil chemotaxis and activation. Therefore,the inhibition of IL-8 production would lead to a direct reduction inthe neutrophil infiltration.

The compounds of Formula (I) are administered in an amount sufficient toinhibit cytokine, in particular IL-1, IL-6, IL-8 or TNF, production suchthat it is regulated down to normal levels, or in some case to subnormallevels, so as to ameliorate or prevent the disease state. Abnormallevels of IL-1, IL-6, IL-8 or TNF, for instance in the context of thepresent invention, constitute: (i) levels of free (not cell bound) IL-1,IL-6, IL-8 or TNF greater than or equal to 1 picogram per ml; (ii) anycell associated IL-1, IL-6, IL-8 or TNF; or (iii) the presence of IL-1,IL-6, IL-8 or TNF mRNA above basal levels in cells or tissues in whichIL-1, IL-6, IL-8 or TNF, respectively, is produced.

The discovery that the compounds of Formula (I) are inhibitors ofcytokines, specifically IL-1, IL-6, IL-8 and TNF is based upon theeffects of the compounds of Formulas (I) on the production of the IL-1,IL-8 and TNF in in vitro assays which are described herein.

As used herein, the term “inhibiting the production of IL-1 (IL-6, IL-8or TNF)” refers to:

a) a decrease of excessive in vivo levels of the cytokine (IL-1, IL-6,IL-8 or TNF) in a human to normal or sub-normal levels by inhibition ofthe in release of the cytokine by all cells, including but not limitedto monocytes or macrophages;

b) a down regulation, at the genomic level, of excessive in vivo levelsof the cytokine (IL-1, IL-6, IL-8 or TNF) in a human to normal orsub-normal levels;

c) a down regulation, by inhibition of the direct synthesis of thecytokine (IL-1, IL-6, IL-8 or TNF) as a postranslational event; or

d) a down regulation, at the translational level, of excessive in vivolevels of the cytokine (IL-1, IL-6, IL-8 or TNF) in a human to normal orsub-normal levels.

As used herein, the term “TNF mediated disease or disease state” refersto any and all disease states in which TNF plays a role, either byproduction of TNF itself, or by TNF causing another monokine to bereleased, such as but not limited to IL-1, IL-6 or IL-8. A disease statein which, for instance, IL-1 is a major component, and whose productionor action, is exacerbated or secreted in response to TNF, wouldtherefore be considered a disease stated mediated by TNF.

As used herein, the term “cytokine” refers to any secreted polypeptidethat affects the functions of cells and is a molecule which modulatesinteractions between cells in the immune, inflammatory or hematopoieticresponse. A cytokine includes, but is not limited to, monokines andlymphokines, regardless of which cells produce them. For instance, amonokine is generally referred to as being produced and secreted by amononuclear cell, such as a macrophage and/or monocyte. Many other cellshowever also produce monokines, such as natural killer cells,fibroblasts, basophils, neutrophils, endothelial cells, brainastrocytes, bone marrow stromal cells, epideral keratinocytes andB-lymphocytes. Lymphokines are generally referred to as being producedby lymphocyte cells. Examples of cytokines include, but are not limitedto, Interleukin-1 (IL-1), Interleukin-6 (IL-6), Interleukin-8 (IL-8),Tumor Necrosis Factor-alpha (TNF-a) and Tumor Necrosis Factor beta(TNF-β).

As used herein, the term “cytokine interfering” or “cytokine suppressiveamount” refers to an effective amount of a compound of Formula (I) whichwill cause a decrease in the in vivo levels of the cytokine to normal orsub-normal levels, when given to a patient for the prophylaxis ortreatment of a disease state which is exacerbated by, or caused by,excessive or unregulated cytokine production.

As used herein, the cytokine referred to in the phrase “inhibition of acytokine, for use in the treatment of a HIV-infected human” is acytokine which is implicated in (a) the initiation and/or maintenance ofT cell activation and/or activated T cell-mediated HIV gene expressionand/or replication and/or (b) any cytokine-mediated disease associatedproblem such as cachexia or muscle degeneration.

As TNF-β (also known as lymphotoxin) has close structural homology withTNF-α (also known as cachectin) and since each induces similar biologicresponses and binds to the same cellular receptor, both TNF-α and TNF-βare inhibited by the compounds of the present invention and thus areherein referred to collectively as “TNF” unless specifically delineatedotherwise.

A member of the MAP kinase family, alternatively termed CSBP, p38, orRK, has been identified independently by several laboratories.Activation of this novel protein kinase via dual phosphorylation hasbeen observed in different cell systems upon stimulation by a widespectrum of stimuli, such as physicochemical stress and treatment withlipopolysaccharide or proinflammatory cytokines such as interleukin-1and tumor necrosis factor. The cytokine biosynthesis inhibitors, of thepresent invention, compounds of Formula (I) have been determined to bepotent and selective inhibitors of CSBP/p38/RK kinase activity. Theseinhibitors are of aid in determining the signaling pathways involvementin inflammatory responses. In particular, for the first time adefinitive signal transduction pathway can be prescribed to the actionof lipopolysaccharide in cytokine production in macrophages. In additionto those diseases already noted, treatment of stroke, neurotrauma,cardiac and renal reperfusion injury, congestive heart failure, coronaryarterial bypass grafting (CABG) surgery, chronic renal failure,angiogenesis & related processes, such as cancer, thrombosis,glomerulonephritis, diabetes and pancreatic β cells, multiple sclerosis,muscle degeneration, eczema, psoriasis, sunburn, and conjunctivitis arealso included.

The CSBP inhibitors were subsequently tested in a number of animalmodels for anti-inflammatory activity. Model systems were chosen thatwere relatively insensitive to cyclooxygenase inhibitors in order toreveal the unique activities of cytokine suppressive agents. Theinhibitors exhibited significant activity in many such in vivo studies.Most notable are its effectiveness in the collagen-induced arthritismodel and inhibition of TNF production in the endotoxic shock model. Inthe latter study, the reduction in plasma level of TNF correlated withsurvival and protection from endotoxic shock related mortality. Also ofgreat importance are the compounds effectiveness in inhibiting boneresorption in a rat fetal long bone organ culture system. Griswold etal., (1988) Arthritis Rheum. 31:1406-1412; Badger, et al., (1989) Circ.Shock 27, 51-61; Votta et al., (1994) in vitro. Bone 15, 533-538; Lee etal., (1993). B Ann. N. Y. Acad. Sci. 696, 149-170.

Chronic diseases which have an inappropriate angiogenic component arevarious ocular neovascularizations, such as diabetic retinopathy andmacular degeneration. Other chronic diseases which have an excessive orincreased proliferation of vasculature are tumor growth and metastasis,atherosclerosis, and certain arthritic conditions. Therefore CSBP kinaseinhibitors will be of utility in the blocking of the angiogeniccomponent of these disease states.

The term “excessive or increased proliferation of vasculatureinappropriate angiogenesis” as used herein includes, but is not limitedto, diseases which are characterized by hemangiomas and ocular diseases.

The term “inappropriate angiogenesis” as used herein includes, but isnot limited to, diseases which are characterized by vesicleproliferation with accompanying tissue proliferation, such as occurs incancer, metastasis, arthritis and atherosclerosis.

Accordingly, the present invention provides a method of treating a CSBPkinase mediated disease in a mammal in need thereof, preferably a human,which comprises administering to said mammal, an effective amount of acompound of Formula (I) or a pharmaceutically acceptable salt thereof.

In order to use a compound of Formula (I) or a pharmaceuticallyacceptable salt thereof in therapy, it will normally be formulated intoa pharmaceutical composition in accordance with standard pharmaceuticalpractice. This invention, therefore, also relates to a pharmaceuticalcomposition comprising an effective, non-toxic amount of a compound ofFormula (I) and a pharmaceutically acceptable carrier or diluent.

Compounds of Formula (I), pharmaceutically acceptable salts thereof andpharmaceutical compositions incorporating such may conveniently beadministered by any of the routes conventionally used for drugadministration, for instance, orally, topically, parenterally or byinhalation. The compounds of Formula (I) may be administered inconventional dosage forms prepared by combining a compound of Formula(I) with standard pharmaceutical carriers according to conventionalprocedures. The compounds of Formula (I) may also be administered inconventional dosages in combination with a known, second therapeuticallyactive compound. These procedures may involve mixing, granulating andcompressing or dissolving the ingredients as appropriate to the desiredpreparation. It will be appreciated that the form and character of thepharmaceutically acceptable character or diluent is dictated by theamount of active ingredient with which it is to be combined, the routeof administration and other well-known variables. The carrier(s) must be“acceptable” in the sense of being compatible with the other ingredientsof the formulation and not deleterious to the recipient thereof.

The pharmaceutical carrier employed may be, for example, either a solidor liquid. Exemplary of solid carriers are lactose, terra alba, sucrose,talc, gelatin, agar, pectin, acacia, magnesium stearate, stearic acidand the like. Exemplary of liquid carriers are syrup, peanut oil, oliveoil, water and the like. Similarly, the carrier or diluent may includetime delay material well known to the art, such as glycerylmono-stearate or glyceryl distearate alone or with a wax.

A wide variety of pharmaceutical forms can be employed. Thus, if a solidcarrier is used, the preparation can be tableted, placed in a hardgelatin capsule in powder or pellet form or in the form of a troche orlozenge. The amount of solid carrier will vary widely but preferablywill be from about 25 mg. to about 1 g. When a liquid carrier is used,the preparation will be in the form of a syrup, emulsion, soft gelatincapsule, sterile injectable liquid such as an ampule or nonaqueousliquid suspension.

Compounds of Formula (I) may be administered topically, that is bynon-systemic administration. This includes the application of a compoundof Formula (I) externally to the epidermis or the buccal cavity and theinstillation of such a compound into the ear, eye and nose, such thatthe compound does not significantly enter the blood stream. In contrast,systemic administration refers to oral, intravenous, intraperitoneal andintramuscular administration.

Formulations suitable for topical administration include liquid orsemi-liquid preparations suitable for penetration through the skin tothe site of inflammation such as liniments, lotions, creams, ointmentsor pastes, and drops suitable for administration to the eye, ear ornose. The active ingredient may comprise, for topical administration,from 0.001% to 10% w/w, for instance from 1% to 2% by weight of theformulation. It may however comprise as much as 10% w/w but preferablywill comprise less than 5% w/w, more preferably from 0.1% to 1% w/w ofthe formulation.

Lotions according to the present invention include those suitable forapplication to the skin or eye. An eye lotion may comprise a sterileaqueous solution optionally containing a bactericide and may be preparedby methods similar to those for the preparation of drops. Lotions orliniments for application to the skin may also include an agent tohasten drying and to cool the skin, such as an alcohol or acetone,and/or a moisturizer such as glycerol or an oil such as castor oil orarachis oil.

Creams, ointments or pastes according to the present invention aresemi-solid formulations of the active ingredient for externalapplication. They may be made by mixing the active ingredient infinely-divided or powdered form, alone or in solution or suspension inan aqueous or non-aqueous fluid, with the aid of suitable machinery,with a greasy or non-greasy base. The base may comprise hydrocarbonssuch as hard, soft or liquid paraffin, glycerol, beeswax, a metallicsoap; a mucilage; an oil of natural origin such as almond, corn,arachis, castor or olive oil; wool fat or its derivatives or a fattyacid such as steric or oleic acid together with an alcohol such aspropylene glycol or a macrogel. The formulation may incorporate anysuitable surface active agent such as an anionic, cationic or non-ionicsurfactant such as a sorbitan ester or a polyoxyethylene derivativethereof. Suspending agents such as natural gums, cellulose derivativesor inorganic materials such as silicaceous silicas, and otheringredients such as lanolin, may also be included.

Drops according to the present invention may comprise sterile aqueous oroily solutions or suspensions and may be prepared by dissolving theactive ingredient in a suitable aqueous solution of a bactericidaland/or fungicidal agent and/or any other suitable preservative, andpreferably including a surface active agent. The resulting solution maythen be clarified by filtration, transferred to a suitable containerwhich is then sealed and sterilized by autoclaving or maintaining at98-100° C. for half an hour. Alternatively, the solution may besterilized by filtration and transferred to the container by an aseptictechnique. Examples of bactericidal and fungicidal agents suitable forinclusion in the drops are phenylmercuric nitrate or acetate (0.002%),benzalkonium chloride (0.01%) and chlorhexidine acetate (0.01%).Suitable solvents for the preparation of an oily solution includeglycerol, diluted alcohol and propylene glycol.

Compounds of Formula (I) may be administered parenterally, that is byintravenous, intramuscular, subcutaneous intranasal, intrarectal,intravaginal or intraperitoneal administration. The subcutaneous andintramuscular forms of parenteral administration are generallypreferred. Appropriate dosage forms for such administration may beprepared by conventional techniques. Compounds of Formula (I) may alsobe administered by inhalation, that is by intranasal and oral inhalationadministration. Appropriate dosage forms for such administration, suchas an aerosol formulation or a metered dose inhaler, may be prepared byconventional techniques.

For all methods of use disclosed herein for the compounds of Formula(I), the daily oral dosage regimen will preferably be from about 0.1 toabout 80 mg/kg of total body weight, preferably from about 0.2 to 30mg/kg, more preferably from about 0.5 mg to 15mg. The daily parenteraldosage regimen about 0.1 to about 80 mg/kg of total body weight,preferably from about 0.2 to about 30 mg/kg, and more preferably fromabout 0.5 mg to 15 mg/kg. The daily topical dosage regimen willpreferably be from 0.1 mg to 150 mg, administered one to four,preferably two or three times daily. The daily inhalation dosage regimenwill preferably be from about 0.01 mg/kg to about 1 mg/kg per day. Itwill also be recognized by one of skill in the art that the optimalquantity and spacing of individual dosages of a compound of Formula (I)or a pharmaceutically acceptable salt thereof will be determined by thenature and extent of the condition being treated, the form, route andsite of administration, and the particular patient being treated, andthat such optimums can be determined by conventional techniques. It willalso be appreciated by one of skill in the art that the optimal courseof treatment, i.e., the number of doses of a compound of Formula (I) ora pharmaceutically acceptable salt thereof given per day for a definednumber of days, can be ascertained by those skilled in the art usingconventional course of treatment determination tests.

The novel compounds of Formula (I) may also be used in association withthe veterinary treatment of mammals, other than humans, in need ofinhibition of CSBP/p38 or cytokine inhibition or production. Inparticular, CSBP/p38 mediated diseases for treatment, therapeutically orprophylactically, in animals include disease states such as those notedherein in the Methods of Treatment section, but in particular viralinfections. Examples of such viruses include, but are not limited to,lentivirus infections such as, equine infectious anaemia virus, caprinearthritis virus, visna virus, or maedi virus or retrovirus infections,such as but not limited to feline immunodeficiency virus (FIV), bovineimmunodeficiency virus, or canine immunodeficiency virus or otherretroviral infections.

Another aspect of the present invention is a method of treating thecommon cold or respiratory viral infection caused by human rhinovirus(HRV), other enteroviruses, coronavirus, influenza virus, parainfluenzavirus, respiratory syncytial virus, or adenovirus in a human in needthereof which method comprises administering to said human an effectiveamount of a CBSP/p38 inhibitor.

Another aspect of the present invention is a method of treating,including prophylaxis of influenza induced pneumonia in a human in needthereof which method comprises administering to said human an effectiveamount of a CBSP/p38 inhibitor

The present invention also relates to the use of the CSBP/p38 kinaseinhibitor for the treatment, including prophylaxis, of inflammationassociated with a viral infection of a human rhinovirus (HRV), otherenteroviruses, coronavirus, influenza virus, parainfluenza virus,respiratory syncytial virus, or adenovirus.

In particular, the present invention is directed to the treatment of aviral infection in a human, which is caused by the human rhinovirus(HRV), other enterovirus, coronavirus, influenza virus, parainfluenzavirus, respiratory syncytial virus, or an adenovirus. In particular theinvention is directed to respiratory viral infections that exacerbateasthma (induced by such infections), chronic bronchitis, chronicobstructive pulmonary disease, otitis media, and sinusitis. Whileinhibiting IL-8 or other cytokines may be beneficial in treating arhinovirus may be known, the use of an inhibitor of the p38 kinase fortreating HRV or other respiratory viral infections causing the commoncold is believed novel.

It should be noted that the respiratory viral infection treated hereinmay also be associated with a secondary bacterial infection, such asotitis media, sinusitis, or pneumonia.

For use herein treatment may include prophylaxis for use in a treatmentgroup susceptible to such infections. It may also include reducing thesymptoms of, ameliorating the symptoms of, reducing the severity of,reducing the incidence of, or any other change in the condition of thepatient, which improves the therapeutic outcome.

It should be noted that the treatment herein is not directed to theelimination or treatment of the viral organism itself but is directed totreatment of the respiratory viral infection that exacerbates otherdiseases or symptoms of disease, such as asthma (induced by suchinfections), chronic bronchitis, chronic obstructive pulmonary disease,otitis media, and sinusitis.

A preferred virus for treatment herein is the human rhinovirus infection(HRV) or respiratory syncytial virus (RSV).

The invention will now be described by reference to the followingbiological examples which are merely illustrative and are not to beconstrued as a limitation of the scope of the present invention.

Biological Examples

The cytokine-inhibiting effects of compounds of the present inventionmay be determined by the following in vitro assays:

Assays for Interleukin-1 (IL-1), Interleukin-8 (IL-8), and TumourNecrosis Factor (TNF) are well known in the art, and may be found in anumber of publications, and patents. Representative suitable assays foruse herein are described in Adams et al., U.S. Pat. No. 5,593,992, whosedisclosure is incorporated by reference in its entirety.

Interleukin-1 (IL-1)

Human peripheral blood monocytes are isolated and purified from eitherfresh blood preparations from volunteer donors, or from blood bank buffycoats, according to the procedure of Colotta et al, J Immunol, 132, 936(1984). These monocytes (1×10⁶) are plated in 24-well plates at aconcentration of 1-2 million/ml per well. The cells are allowed toadhere for 2 hours, after which time non-adherent cells are removed bygentle washing. Test compounds are then added to the cells for 1 hbefore the addition of lipopolysaccharide (50 ng/ml), and the culturesare incubated at 37° C. for an additional 24 h. At the end of thisperiod, culture supernatants are removed and clarified of cells and alldebris. Culture supernatants are then immediately assayed for IL-1biological activity, either by the method of Simon et al., J. Immunol.Methods, 84, 85, (1985) (based on ability of IL-1 to stimulate aInterleukin 2 producing cell line (EL-4) to secrete IL-2, in concertwith A23187 ionophore) or the method of Lee et al., J. ImmunoTherapy, 6(1), 1-12 (1990) (ELISA assay).

In Vivo TNF Assay:

(1) Griswold et al., Drugs Under Exp. and Clinical Res., XIX (6),243-248 (1993); or

(2) Boehm, et al., Journal Of Medicinal Chemistry 39, 3929-3937 (1996)whose disclosures are incorporated by reference herein in theirentirety.

LPS-Induced TNFα Production in Mice and Rats

In order to evaluate in vivo inhibition of LPS-induced TNFα productionin rodents, both mice and rats are injected with LPS.

Mouse Method

Male Balb/c mice from Charles River Laboratories are pretreated (30minutes) with compound or vehicle. After the 30 min. pretreat time, themice are given LPS (lipopolysaccharide from Escherichia coli Serotype055-85, Sigma Chemical Co., St Louis, Mo.) 25 ug/mouse in 25 ulphosphate buffered saline (pH 7.0) intraperitoneally. Two hours laterthe mice are killed by CO₂ inhalation and blood samples are collected byexsanguination into heparinized blood collection tubes and stored onice. The blood samples are centrifuged and the plasma collected andstored at −20° C. until assayed for TNFα by ELISA.

Rat Method

Male Lewis rats from Charles River Laboratories are pretreated atvarious times with compound or vehicle. After a determined pretreattime, the rats are given LPS (lipopolysaccharide from Escherichia coliSerotype 055-85, Sigma Chemical Co., St Louis, Mo.) 3.0 mg/kgintraperitoneally. The rats are killed by CO₂ inhalation and heparinizedwhole blood is collected from each rat by cardiac puncture 90 minutesafter the LPS injection. The blood samples are centrifuged and theplasma collected for analysis by ELISA for TNFα levels.

ELISA Method

TNFα levels were measured using a sandwich ELISA, as described inOlivera et al., Circ. Shock, 37, 301-306, (1992), whose disclosure isincorporated by reference in its entirety herein, using a hamstermonoclonal antimurine TNFα (Genzyme, Boston, Mass.) as the captureantibody and a polyclonal rabbit antimurine TNFa (Genzyme) as the secondantibody. For detection, a peroxidase-conjugated goat antirabbitantibody (Pierce, Rockford, Ill.) was added, followed by a substrate forperoxidase (1 mg/ml orthophenylenediamine with 1% urea peroxide). TNFαlevels in the plasma samples from each animal were calculated from astandard curve generated with recombinant murine TNFα (Genzyme).

LPS-Stimulated Cytokine Production in Human Whole Blood

Assay: Test compound concentrations were prepared at 10× concentrationsand LPS prepared at 1 ug/ml (final conc. of 50 ng/ml LPS) and added in50 uL volumes to 1.5 mL eppendorf tubes. Heparinized human whole bloodwas obtained from healthy volunteers and was dispensed into eppendorftubes containing compounds and LPS in 0.4 mL volumes and the tubesincubated at 37 C. Following a 4 hour incubation, the tubes werecentrifuged at 5000 rpm for 5 minutes in a TOMY microfuge, plasma waswithdrawn and frozen at −80 C.

Cytokine measurement: IL-I and/or TNF were quantified using astandardized ELISA technology. An in-house ELISA kit was used to detecthuman IL-1 and TNF. Concentrations of IL-1 or TNF were determined fromstandard curves of the appropriate cytokine and IC50 values for testcompound (concentration that inhibited 50% of LPS-stimulated cytokineproduction) were calculated by linear regression analysis.

CSBP/p38 Kinase Assay:

This assay measures the CSBP/p38-catalyzed transfer of ³²P from[a-³²P]ATP to threonine residue in an epidermal growth factor receptor(EGFR)-derived peptide (T669) with the following sequence:KRELVEPLTPSGEAPNQALLR (SEQ ID No. 1) (residues 661-681). (See Gallagheret al., “Regulation of Stress Induced Cytokine Production by PyridinylImidazoles: Inhibition of CSBP Kinase”, BioOrganic & MedicinalChemistry, 1997, 5, 49-64).

Reactions were carried in round bottom 96 well plate (from Corning) in a30 ml volume. Reactions contained (in final concentration): 25 mM Hepes,pH 7.5; 8 mM MgCl₂; 0.17 mM ATP (the Km_([ATP]) of p38 (see Lee et al.,Nature 300, n72 pg. 639-746 (December 1994)); 2.5 uCi of [g-32P]ATP; 0.2mM sodium orthovanadate; 1 mM DTT; 0.1% BSA; 10% glycerol; 0.67 mM T669peptide; and 2-4 nM of yeast-expressed, activated and purified p38.Reactions were initiated by the addition of [gamma-32P]Mg/ATP, andincubated for 25 min. at 37° C. Inhibitors (dissolved in DMSO) wereincubated with the reaction mixture on ice for 30 minutes prior toadding the 32P-ATP. Final DMSO concentration was 0.16%. Reactions wereterminated by adding 10 ul of 0.3 M phosphoric acid, and phosphorylatedpeptide was isolated from the reactions by capturing it on p81phosphocellulose filters. Filters were washed with 75 mM phosphoricacids, and incorporated 32P was quantified using beta scintillationcounter. Under these conditions, the specific activity of p38 was400-450 pmol/pmol enzyme, and the activity was linear for up to 2 hoursof incubation. The kinase activity values were obtained aftersubtracting values generated in the absence of substrate which were10-15% of total values.

Representative final compounds of Formula (I) and (Ia) which have beentested, Examples 29, 31 to 35, 37 to 41, 43, 45 to 47, 60 to 65, 67 to105, 107 to 109, 112 to 186, 188 to 193, 195 to 231, 233 to 239, 241 to243 have all demonstrated positive inhibitory activity in this bindingassay, having an IC₅₀ of <10 uM.

Representative final compounds of Formula (II) and (IIa) which have beentested. Example 111 has demonstrated positive inhibitory activity inthis binding assay, having an IC₅₀ of <10 uM.

TNF-α in Traumatic Brain Injury Assay

This assay provides for examination of the expression of tumor necrosisfactor mRNA in specific brain regions which follow experimentallyinduced lateral fluid-percussion traumatic brain injury (TBI) in rats.Since TNF-α is able to induce nerve growth factor (NGF) and stimulatethe release of other cytokines from activated astrocytes, thispost-traumatic alteration in gene expression of TNF-α plays an importantrole in both the acute and regenerative response to CNS trauma. Asuitable assay may be found in WO 97/35856 whose disclosure isincorporated herein by reference.

CNS Injury Model for IL-b mRNA

This assay characterizes the regional expression of interleukin-1β(IL-1β) mRNA in specific brain regions following experimental lateralfluid-percussion traumatic brain injury (TBI) in rats. Results fromthese assays indicate that following TBI, the temporal expression ofIL-1β mRNA is regionally stimulated in specific brain regions. Theseregional changes in cytokines, such as IL-1β play a role in thepost-traumatic pathologic or regenerative sequelae of brain injury. Asuitable assay may be found in WO 97/35856 whose disclosure isincorporated herein by reference.

Angiogenesis Assay:

Described in WO 97/32583, whose disclosure is incorporated herein byreference, is an assay for determination of inflammatory angiogenesiswhich may be used to show that cytokine inhibition will stop the tissuedestruction of excessive or inappropriate proliferation of bloodvessels.

Rhinovirus/Influenza Assay:

Cell lines, rhinovirus serotype 39, and influenza virus A/PR/8/34 werepurchased from American Type Culture Collection (ATCC). BEAS-2B cellswere cultured according to instructions provided by ATCC using BEGM(bronchial epithelial growth media) purchased from Clonetics Corp. HELAcell cultures, used for detection and titration of virus, weremaintained in Eagle's minimum essential media containing 10% fetal calfserum, 2 mM 1-glutamine, and 10 mM HEPES buffer (MEM).

A modification of the method reported by Subauste et al., Supra, for invitro infection of human bronchial epithelial cells with rhinovirus wasused in these studies. BEAS-2B cells (2×10⁵/well) were cultured incollagen-coated wells for 24 hours prior to infection with rhinovirus.Rhinovirus serotype 39 was added to cell cultures for one hourincubation at 34° C. after which inoculum was replaced with fresh mediaand cultures were incubated for an additional 72 hours at 34° C.Supernatants collected at 72 hours post-infection were assayed forcytokine protein concentration by ELISA using commercially availablekits (R&D Systems). Virus yield was also determined from culturesupernatants using a microtitration assay in HELA cell cultures(Subauste et al., supra 1995). In cultures treated with p38 kinaseinhibitors, drug was added 30 minutes prior to infection. Stocks ofcompounds were prepared in DMSO (10 mM drug) and stored at −20° C.

For detection of p38 kinase, cultures were incubated in basal mediawithout growth factors and additives to reduce endogenous levels ofactivated p38 kinase. Cells were harvested at various timepoints afteraddition of rhinovirus. Detection of tyrosine phosphorylated p38 kinaseby immunoblot was analyzed by a commercially available kit and wasperformed according to the manufacturer's instructions (PhosphoPlus p38MAPK Antibody Kit: New England BioLabs Inc.).

In some experiments, BEAS-2B cells were infected with influenza virus(strain A/PR/8/34) in place of rhinovirus. Culture supernatant washarvested 48 and 72 hour post-infection and tested by ELISA for cytokineas described above.

Cells and Virus: Influenza A/PR/8/34 sub type H1N1 (VR-95 American TypeCulture Collection, Rockville, Md.) was grown in the allantoic cavity of10 day old chicken eggs. Following incubation at 37° C., andrefrigeration for 2½ hours at 4° C., allantoic fluid was harvested,pooled, and centrifuged (1,000 rcf; 15 min; 4° C.) to remove cells.Supernatent was aliquoted and stored at −70° C. The titer of the stockculture of virus was 1.0×10¹⁰ Tissue Culture Infective Dose/ml (TCID₅₀)

Inoculation procedure: Four-six week old female Balb/cAnNcrlBr mice wereobtained from Charles River, Raleigh, N.C. Animals were infectedintranasally. Mice were anesthetized by intraperitioneal injection ofKetamine (40 mg/kg; Fort Dodge Labs, Fort Dodge, Iowa) and Xylazine (5mg/kg; Miles, Shawnee Mission, Kans.) and then inoculated with 100TCID50 of PR8 diluted in PBS in 20 ul. Animals were observed daily forsigns of infection. All animal studies were approved by SmithKlineBeecham Pharmaceuticals Institutional Animal Care and Use Committee.

Virus titration: At various times post infection, animals weresacrificed and lungs were aseptically harvested. Tissues werehomogenized, in vials containing 1 micron glass beads (Biospec Products,Bartlesville, Okla.) and 1 ml. of Eagles minimal essential medium. Celldebris was cleared by centrifugation at 1,000 rcf for 15 minutes at 4°C., and supernatants were serially diluted on Madin-Darby canine kidney(MDCK) cells. After 5 days of incubation at 37° C. (5% CO₂), 50 μl of0.5% chick red blood cells were added per well, and agglutination wasread after 1 hour at room temperature. The virus titer is expressed as50% tissue culture infective dose (TCID₅₀) calculated by logisticregression.

ELISA: Cytokine levels were measured by quantitative ELISA usingcommercially available kits. Ear samples were homogenized using a tissueminser in PBS. Cell debris was cleared by centrifugation at 14,000 rpmfor 5 minutes. The cytokine concentrations and thresholds weredetermined as described by the manufacturer; IL-6, IFN-γ, and KC (R&DSystems, Minneapolis, Minn.).

Myeloperoxidase Assay: Myeloperoxidase (MPO) activity was determinedkinetically as described by Bradley et al. (1982). Briefly, rabbitcornea were homogenized in Hexadecyl Trimethyl-Ammonium Bromide (HTAB)(Sigma Chemical Co. St. Louis, Mo.) which was dissolved in 0.5 mPotassium phosphate buffer (J.T. Baker Scientific, Phillipsburg, N.J.).Following homogenization, the samples were subjected tofreeze-thaw-sonication (Cole-Parmer 8853, Cole-Parmer, Vernon Hills,Ill.) 3 times. Suspensions were then cleared by centrifugation at12,500×g for 15 minutes at 4° C. MPO enzymatic activity was determinedby colormetric change in absorbance during a reaction of O-Dianisidinedihydrochloride (ODI) 0.175 mg/ml (Sigma Chemical Co. St. Louis, Mo.)with 0.0002% Hydrogen peroxide (Sigma Chemical Co. St. Louis, Mo.).Measurements were performed by using a Beckman Du 640 Spectrophotometer(Fullerton, Calif.) fitted with a temperature control device. 50 ul ofmaterial to be assayed was added to 950 ul of ODI and change inabsorbance was measured at a wave length of 460 nm for 2 minutes at 25°C.

Whole Body Plethysomography: Influenza virus infected mice were placedinto a whole body plethysomograph box with an internal volume ofapproximately 350-ml. A bias airflow of one l/min was applied to the boxand flow changes were measured and recorded with a Buxco XA dataacquisition and respiratory analysis system (Buxco Electronics, Sharon,Conn.). Animals were allowed to acclimate to the plethysmograph box for2 min. before airflow data was recorded. Airway measurements werecalculated as Penh (enhanced pause). Penh has previously been shown asan index of airway obstruction and correlates with increasedintrapleural pressure. The algorithm for Penh calculation is as follows:Penh=[(expiratory time/relaxation time)−1]×(peak expiratory flow/peakinspiratory flow) where relaxation time is the amount of time requiredfor 70% of the tidal volume to be expired.

Determination of arterial oxygen saturation. A Nonin veterinary handheld pulse oximeter 8500V with lingual sensor (Nonin Medical, Inc.,Plymouth Minn.) was used to determine daily arterial oxygen saturation %SpO2 as described (Sidwell et al. 1992 Antimicrobial Agents andChemotherapy 36:473-476).

Additional data and assay modifications may be found in PCT/US00/25386,(WO 01/19322) filed 15 Sep. 2000, whose disclosure is incorporatedherein by reference in its entirety.

Synthetic Examples

The invention will now be described by reference to the followingexamples which are merely illustrative and are not to be construed as alimitation of the scope of the present invention. All temperatures aregiven in degrees centigrade, all solvents are highest available purityand all reactions run under anhyd conditions in an Ar atmosphere wherenecessary.

Mass spectra were run on an open access LC-MS system using electrosprayionization. LC conditions: 4.5% to 90% CH₃CN (0.02% TFA) in 3.2 min witha 0.4 min hold and 1.4 min re-equilibration; detection by MS, UV at 214nm, and a light scattering detector (ELS). Column: 1×40 mm Aquasil (C18)¹H-NMR (hereinafter “NMR”) spectra were recorded at 400 MHz using aBruker AM 400 spectrometer or a Bruker AVANCE 400. Multiplicitiesindicated are: s=singlet, d=doublet, t=triplet, q=quartet, m=multipletand br indicates a broad signal. For preparative (prep) hplc; ca 50 mgof the final products were injected in 500 uL of DMSO onto a 50×20 mm I.D. YMC CombiPrep ODS-A column at 20 mL/min with a 10 min gradient from10% CH₃CN (0.1% TFA) to 90% CH₃CN (0.1% TFA) in H₂O (0.1% TFA) and a 2min hold (unless otherwise stated). Flash chromatography was run overMerck Silica gel 60 (230-400 mesh) in solvent mixtures containingvarying relative concentrations of dichloromethane and methanol, orEtOAc, and hexane, unless otherwise stated. Chromatotron chromatographyas has been previously described (Desai, H K; Joshi, B S; Panu, A M;Pelletier, S W J. Chromatogr. 1985 223-227.) was run on chromatotronplates available from Analtech, Wilmington Del., USA.

satd=saturated; aq=aqueous; NMP=1-methyl-2-pyrrolidinone; otherabbreviations are as described in the ACS Style Guide (American ChemicalSociety, Washington, D.C., 1986).

Example 1

4-Chloro-2-methylsulfanyl-6-phenylamino-pyrimidine-5-carbaldehyde

To a solution of aniline (550 microliter (hereinafter “μL” or “uL”), 6millimoles (hereinafter “mmol”), 1.2 equivalents (hereinafter “eq”)) indry DMSO (100 mL) was added NaH as a 60% suspension in mineral oil (240milligrams (hereinafter “mg”), 6 mmol, 1.2 eq) and the reaction mixturewas stirred for 1 hour (hereinafter “h”). To the red solution was thenadded 4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde (1.11grams (hereinafter “g”), 5 mmol) [Santilli, et al., J. Heterocycl. Chem.1971, 8, 445-45] dissolved in anhydrous DMSO (20 milliliters(hereinafter “mL”)). The reaction mixture turned yellow and was stirred2 h at 23°, H₂O (250 mL) was added followed by EtOAc (500 mL) The layerswere separated; the organic layer was washed with saturated (hereinaftersat'd) aq. NaCl, dried (MgSO₄) and filtered. The organic layer wasevaporated and the crude residue was dissolved in isopropanol (50 mL)and heated to 60°, H₂O (50 mL) was added and the solution was cooledslowly to 23°. The product was isolated by filtration and dried in vacuoto afford 1.06 g (76% yield) of pure4-chloro-2-methylsulfanyl-6-phenylamino-pyrimidine-5-carbaldehyde.¹H-NMR δ 2.59 (s, 3H), 7.21 (m, 1H), 7.44 (m, 2H), 7.68 (m, 2H), 10.37(s, 1H), 11.38 (br s, 1H). LC MS (m/e)=280 (MH+).

Example 2

4-Chloro-6-(2,6-difluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

To a solution of 4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde(11.1 g, 50 mmol) in CHCl₃ (100 mL) was added 2,6-difluoroaniline (8.07mL, 75 mmol, 1.5 eq) followed by Et₃N (10.43 mL, 75 mmol, 1.5 eq). Thereaction mixture turned yellow and was heated to reflux for 24 h, H₂O(50 mL) was added and the layers were separated. The organic layer wasevaporated and the crude product was recrystallized from 200 mL of amethanol: H₂O mixture (2:1) to give 12.03 g (76%) of pure4-chloro-6-(2,6-difluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.21 (s, 3H), 6.91 (m, 2H), 7.24 (m, 1H), 10.29 (s, 1H), 10.35(br s, 1H). LC MS (m/e)=316 (MH+).

Example 3

4-Chloro-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 1 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and2-chloroaniline to give the title compound4-chloro-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.55 (s, 3H), 7.17 (m, 1H), 7.29 (m, 2H), 7.44 (m, 1H), 10.37(s, 1H), 11.49 (br s, 1H). LC MS (m/e)=315 (MH+).

Example 4

4-Chloro-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 2 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and2-fluoroaniline to give the title compound4-chloro-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.53 (s, 3H), 7.15 (m, 3H), 8.25 (m, 1H), 7.44 (m, 1H), 10.31(s, 1H), 11.35 (br s, 1H). LC MS (m/e)=298 (MH+).

Example 5

4-Chloro-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 2 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and3-pentylamine to give the title compound4-chloro-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.92 (t, 6H, J=7.3 Hz), 1.50-1.74 (m, 4H), 2.52 (s, 3H), 4.22(m, 1H), 9.21 (br s, 1H), 10.33 (s, 1H). LC MS (m/e)=274 (MH+).

Example 6

4-Chloro-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 2 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde andisopropylamine to give the title compound4-chloro-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 1.31 (d, 6H, J=5.7 Hz), 2.60 (s, 3H), 4.47 (m, 1H), 9.16 (brs, 1H), 10.25 (s, 1H). LC MS (m/e)=246 (MH+).

Example 7

4-Chloro-6-cyclopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 2 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde andcyclopropylamine to give the title compound4-chloro-6-cyclopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.68 (m, 2H), 0.90 (m, 2H), 2.58 (s, 3H), 3.07 (m, 1H), 9.20(br s, 1H), 10.28 (s, 1H). LC MS (m/e)=244 (MH+).

Example 8

4-sec-Butylamino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 2 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and 2-butylamineto give the title compound4-sec-butylamino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.87 (m, 3H), 1.18 (m, 3H), 1.20 (m, 2H), 2.51 (s, 3H), 4.24(m, 1H), 9.12 (br s, 1H), 10.18 (s, 1H). LC MS (m/e)=260 (MH+).

Example 9

4-Chloro-6-(cyclopropylmethyl-amino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 2 starting from4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and(aminomethyl)cyclopropane to give the title compound4-chloro-6-(cyclopropylmethyl-amino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.32 (m, 2H), 0.59 (m, 2H), 1.12 (m, 1H), 2.55 (s, 3H), 3.46(m, 2H), 9.35 (br s, 1H), 10.28 (s, 1H). LC MS (m/e)=258 (MH+).

Example 10

4-Amino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde

To the solution of4,6-dichloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde (2 g, 7.36 mmol)in benzene (20 mL) was introduced NH₃ gas for 30 minutes (hereinafter“min”). The formed solid was then filtered and recrystallized from EtOAc(15 mL) to give 1.18 g (80%) of pure4-amino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde. ¹H-NMR: δ2.50 (s, 3H), 7.28 (t, 3H, J=45 Hz, D₂O exchangeable), 8.65 (d, 3H, J=41Hz, D₂O exchangeable), 10.11 (s, 1H).

Example 11

2-Methylsulfanyl-4-phenyl-6-phenylamino-pyrimidine-5-carbaldehyde

To a solution of4-chloro-2-methylsulfanyl-6-phenylamino-pyrimidine-5-carbaldehyde (300mg, 1.07 mmol) in dioxane (21 mL) and H₂O (7 mL) was added anhyd K₂CO₃(443 mg, 3.21 mmol, 3 eq) followed by phenylboronic acid (196 mg, 1.6mmol, 1.5 eq). The reaction mixture was degassed andtetrakis(triphenylphosphine)-palladium (61 mg, 0.053 mmol, 0.05 eq) wasadded. The reaction mixture was then heated under reflux for 24 h andcooled 23°, the layers were separated, EtOAc (50 mL), followed by H₂O(10 mL), was added, the organic layer was separated, washed with satd aqNaCl, dried (MgSO₄) and filtered. The yellow solution was thenevaporated. Product was purified by column chromatography or bycrystallization from 10 mL of isopropanol:H₂O (2:1) to give 240 mg (70%yield) of pure2-methylsulfanyl-4-phenyl-6-phenylamino-pyrimidine-5-carbaldehyde.¹H-NMR δ 2.60 (s, 3H), 7.22 (m, 1H), 7.35-7.81 (m, 9H), 9.89 (s, 1H),11.31 (br s, 1H), LC MS (m/e)=322 (MH+).

Example 12

4-(2,6-Difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(2,6-difluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 4-fluoro-2-methyl-phenylboronic acid to give the title compound4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.21 (s, 3H), 2.25 (s, 3H), 6.95 (m, 4H), 7.18 (m, 4H), 9.54(s, 1H), 10.29 (br s, 1H). LC MS (m/e)=390 (MH+).

Example 13

4-(1-Ethyl-propylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 4-fluoro-2-methyl-phenylboronic acid to give the title compound4-(1-ethyl-propylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.92 (m, 6H), 1.54-1.71 (m, 4H), 2.21 (s, 3H), 2.53 (s, 3H),4.28 (m, 1H), 6.63-7.05 (m, 2H), 7.21 (m, 1H), 9.05 (br s, 1H), 10.50(s, 1H). LC MS (m/e)=348 (MH+).

Example 14

4-(2-Chloro-phenyl)-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-chlorophenylboronic acid to give the title compound4-(2-chloro-phenyl)-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.91 (m, 6H), 1.42-1.60 (m, 4H), 2.45 (s, 3H), 4.21 (m, 1H),7.32 (m, 4H), 8.96 (br s, 1H), 9.44 (s, 1H). LC MS (m/e)=350 (MH+).

Example 15

4-(2-Chloro-phenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-chlorophenylboronic acid to give the title compound4-(2-chloro-phenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.58 (s, 3H), 7.01-7.59 (m, 7H), 8.61 (d, 1H, J=4.7 Hz), 9.65(s, 1H), 11.48 (br s, 1H). LC MS (m/e)=390 (MH+).

Example 16

4-(2-Fluoro-phenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-fluorophenylboronic acid to give the title compound4-(2-fluoro-phenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.60 (s, 3H), 6.99-7.68 (m, 7H), 8.47 (d, 1H, J=4.7 Hz), 9.78(s, 1H), 11.59 (br s, 1H). LC MS (m/e)=374 (MH+).

Example 17

4-Amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-amino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and2-fluorophenylboronic acid to give the title compound4-amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.59 (s, 3H), 5.78 (br s, 1H), 7.11-7.32 (m, 2H), 7.42-7.58(m, 2H), 8.65 (br s, 1H), 9.71 (s, 1H). LC MS (m/e)=264 (MH+).

Example 18

4-(2-Fluoro-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde and2-fluorophenylboronic acid to give the title compound4-(2-fluoro-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 1.31 (d, 6H, J=5.7 Hz), 2.56 (s, 3H), 4.51 (m, 1H), 7.05-7.31(m, 2H), 7.41-7.55 (m, 2H), 9.02 (br s, 1H), 9.64 (s, 1H). LC MS(m/e)=306 (MH+).

Example 19

4-Cyclopropylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-cyclopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-fluorophenylboronic acid to give the title compound4-cyclopropylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.66 (m, 2H), 0.92 (m, 2H) 2.60 (s, 3H), 3.11 (m, 1H),7.10-7.30 (m, 2H), 7.41-7.57 (m, 2H), 9.10 (br s, 1H), 9.66 (s, 1H). LCMS (m/e)=304 (MH+).

Example 20

4-(Cyclopropylmethyl-amino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-cyclopropylmethyl-amino-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-fluorophenylboronic acid to give the title compound4-(cyclopropylmethyl-amino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.34 (m, 2H), 0.61 (m, 2H), 1.19 (m, 1H), 2.56 (s, 3H), 3.51(m, 2H), 7.11-7.27 (m, 2H), 7.31-7.52 (m, 2H), 9.22 (br s, 1H), 9.69 (s,1H). LC MS (m/e)=318 (MH+).

Example 21

4-(2,6-Difluoro-phenylamino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(2,6-difluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-fluorophenylboronic acid to give the title compound4-(2,6-difluoro-phenylamino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ0.31 (s, 3H), 6.98-7.20 (m, 3H), 7.26 (m, 2H), 7.38-7.42 (m,2H), 9.79 (s, 1H), 10.39 (br s, 1H). LC MS (m/e)=376 (MH+).

Example 22

4-(2-Fluoro-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 2-fluorophenylboronic acid to give the title compound4-(2-fluoro-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ0.61 (s, 3H), 7.11-7.23 (m, 4H), 7.26 (m, 1H), 7.45-7.62 (m,2H), 8.38 (m, 1H), 9.80 (s, 1H), 11.33 (br s, 1H). LC MS (m/e)=358(MH+).

Example 23

4-sec-Butylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-sec-butylamino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and2-fluorophenylboronic acid to give the title compound4-sec-butylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.96 (m, 3H), 1.30 (m, 3H), 1.67 (m, 2H), 2.58 (s, 3H), 4.38(m, 1H), 7.11-7.31 (m, 2H), 7.42-7.58 (m, 2H), 9.07 (br s, 1H), 9.63 (s,1H). LC MS (m/e)=306 (MH+).

Example 24

4-(4-Fluoro-2-methyl-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde and4-fluoro-2-methylphenylboronic acid to give the title compound4-(4-fluoro-2-methyl-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 1.31 (d, 6H, J=5.7 Hz), 2.21 (s, 3H), 2.59 (s, 3H), 4.52 (m,1H), 7.90-7.15 (m, 2H), 7.18-7.25 (m, 1H), 9.06 (br s, 1H), 9.50 (s,1H). LC MS (m/e)=320 (MH+).

Example 25

4-Cyclopropylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-cyclopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 4-fluoro-2-methylphenylboronic acid to give the title compound4-cyclopropylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.69 (m, 2H), 0.94 (m, 2H), 2.23 (s, 3H), 2.62 (s, 3H), 3.14(m, 1H), 6.98 (m, 2H), 7.20 (m, 1H), 9.09(br s, 1H), 9.49 (s, 1H). LC MS(m/e)=318 (MH+).

Example 26

4-(Cyclopropylmethyl-amino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-cyclopropylmethyl-amino-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 4-fluoro-2-methylphenylboronic acid to give the title compound4-(cyclopropylmethyl-amino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 0.30 (m, 2H), 0.60 (m, 2H), 1.18 (m, 1H), 2.24 (s, 3H), 2.55(s, 3H), 3.50 (m, 2H), 6.98 (m, 2H), 7.18 (m, 1H), 9.21 (br s, 1H), 9.50(s, 1H). LC MS (m/e)=332 (MH+).

Example 27

4-(4-Fluoro-2-methyl-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-chloro-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeand 4-fluoro-2-methylphenylboronic acid to give the title compound4-(4-fluoro-2-methyl-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 2.28 (s, 3H).59 (s, 3H), 7.01 (m, 2H), 7.18 (m, 3H), 7.24 (m,1H), 8.42 (m, 1H), 9.63 (s, 1H), 11.30 (br s, 1H). LC MS (m/e)=372(MH+).

Example 28

4-sec-Butylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

Prepared as described above in Example 11 starting from4-sec-butylamino-6-chloro-2-methylsulfanyl-pyrimidine-5-carbaldehyde and4-fluoro-2-methylphenylboronic acid to give the title compound4-sec-butylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR: δ 1.02 (in, 3H), 1.30 (m, 3H), 1.70 (m, 2H), 2.28 (m, 3H), 2.59(s, 3H), 4.37 (m, 1H), 6.98 (m, 2H), 7.20 (m, 1H), 9.04 (br s, 1H), 9.50(s, 1H). LC MS (m/e)=334 (MH+).

Example 29

2-Methylsulfanyl-4,8-diphenyl-8H -pyrido[2,3-d]pyrimidin-7-one

A solution of 18-crown-6 (422 mg, 1.6 mmol, 5 eq) andbis(2,2,2-trifluoroethyl)(methoxycarbonylmethyl)phosphonate (81 μL, 0.38mmol, 1.2 eq) in anhydrous THF (20 mL) was cooled to −78°. To thissolution was added potassium bis(trimethylsilyl)amide (0.96 mL, 0.48mmol, 1.5 eq) as a 0.5 mol solution in toluene. This solution wasstirred for additional 30 min at −78° and2-methylsulfanyl-4-phenyl-6-phenylamino-pyrimidine-5-carbaldehyde (102mg, 0.32 mmol) in dry THF (1 mL) was added dropwise. The reactionmixture was then stirred for 8 h at −78° and warmed to 23° and stirred16 h. Sat'd aq. NH₄Cl (5 mL), followed by diethyl ether (20 mL), wasadded. The layers were separated. The organic layer was washed with satdaq NaCl, dried (MgSO₄), filtered and solvent was evaporated. The yellowresidue was then purified by flash chromatography to afford 100 mg (91%yield) of pure2-methylsulfanyl-4,8-diphenyl-8H-pyrido[2,3-d]pyrimidin-7-one. ¹H-NMR δ2.19 (s, 3H), 6.70 (d, 1H, J=9.9 Hz), 7.26 (m, 2H), 7.42-7.83 (m, 8H),7.88 (d, 1H, J=9.9 Hz), LC MS (m/e)=346 (MH+).

Example 30

(E)-3-[4-(2,6-Difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid ethyl ester

To a solution of triethyl phosphonoacetate (8.18 mL, 41.3 mmol, 2 eq) in120 mL of anhyd THE was added NaH (2.05 g, 60% dispersion in mineraloil, 51.4 mmol, 2.5 eq) and the reaction mixture was stirred for 30 minat 23°. To this solution was added4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde(8 g, 20.65 mmol) as a solution in 10 mL of anhyd THF and the reactionmixture was heated under reflux for 3 h while being monitored by HPLC.After completion, 20 mL of satd aq NH₄Cl was added and the layers wereseparated. The aq layer was washed with Et₂O (100 mL) and the organiclayers were combined. The organic layer was washed with H₂O, and satd aqNaCl, dried (MgSO₄), filtered and solvent was evaporated. The crudeproduct was recrystalized from 100 mL of methanol: H₂O (1:1) to afford8.1 g (88%) of pure(E)-3-[4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid ethyl ester. LC MS (m/e)=460 (MH+). Rt=2.49 min

Example 31

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

(E)-3-[4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid ethyl ester (8.1 g, 17.6 mmol) was dissolved in 50 mL of anhydroustoluene. Reaction mixture was heated in a sealed tube at 220° C. for 48h, toluene was evaporated and the yellow residue purified by Flashchromatography to give 7.1 g (96%) of8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 2.24 (s, 3H), 2.29 (s, 3H), 6.63 (d, 1H, J=9.6 Hz),7.03-7.20 (m, 4H), 7.25 (m, 1H), 7.51 (m, 2H); LC MS (m/e)=414 (M:H+).

Example 32

4,8-Bis-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of4-(2-fluoro-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde,as described in Example 22, (400 mg, 1.1 mmol) in pyridine (2 mL) wasadded Ac₂O (2 mL) and the reaction mixture was heated under reflux for48 h, solvent was evaporated and the residue was dissolved in EtOAc (40mL), washed with 1 M aq Na₂CO₃, and H₂O and satd aq NaCl, dried (MgSO₄),filtered and solvent was evaporated. The yellow residue was purified byFlash chromatography to afford pure4,8-bis-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one(320 mg, 76% yield). ¹H-NMR (CDCl₃) δ 2.21 (s, 3H), 6.76 (d, 1H, J=9.6Hz), 7.22-7.42 (m, 4H), 7.45-7.67 (m, 5H). LC MS (m/e)=382 (MH+).

Example 33

8-(2-Chloro-phenyl)-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(2-fluoro-phenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-(2-chloro-phenyl)-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 2.08 (s, 3H), 6.61 (d, 1H, J=9.7 Hz), 7.11-7.51 (m, 9H). LC MS(m/e)=399 (MH+)

Example 34

4,8-Bis-(2-chloro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(2-chloro-phenyl)-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound4,8-bis-(2-chloro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 1.99 (s, 3H), 6.50 (d, 1H, J=9.7 Hz), 7.11-7.48 (m, 9H). LC MS(m/e)=414 (MH+)

Example 35

8-Cyclopropylmethyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(cyclopropylmethyl-amino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-cyclopropylmethyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.56 (m, 4H), 1.48 (m, 1 H), 2.65 (s, 3H), 3.79 (s, 2H), 6.62(d, 1H, J=9.7 Hz), 7.19-7.39 (m, 3H), 7.42-7.60 (m, 2H). LC MS (m/e)=342(MH+)

Example 36

8-Cyclopropyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-cyclopropylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-cyclopropyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.98 (m, 2H), 1.35 (m, 2H) 2.69 (s, 3H), 3.02 (m, 1H), 6.55(d, 1H, J=9.6 Hz), 7.12-7.36 (m, 2H), 7.42-7.60 (m, 3H). LC MS (m/e)=328(MH+).

Example 37

8-sec-Butyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-sec-butylamino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-sec-butyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.91 (m, 3H), 1.67 (m, 3H), 2.00-2.42 (m, 2H), 2.69 (s, 3H),5.85 (m, 1H), 6.79 (d, 1H, J=9.7 Hz), 7.24-7.44 (m, 1H), 7.50-7.75 (m,4H). LC MS (m/e)=328 (MH+)

Example 38

4-(2-Fluoro-phenyl)-8-isopropyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(2-fluoro-phenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound4-(2-fluoro-phenyl)-8-isopropyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 1.69 (m, 6H), 2.60 (s, 3H), 5.91 (m, 1H), 6.52 (d, 1H, J=9.6Hz), 7.16-7.49 (m, 5H). LC MS (m/e)=330 (MH+).

Example 39

8-Cyclopropylmethyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(cyclopropylmethyl-amino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-cyclopropylmethyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.55 (m, 4H), 1.56 (m, 1H), 2.23 (s, 3H), 2.67 (s, 3H), 4.40(m, 2H), 6.60 (d, 1H, J=9.6 Hz), 7.05 (m, 2H), 7.22 (m, 1H), 7.39 (d,1H, J=9.6 Hz). LC MS (m/e)=356 (MH+).

Example 40

8-Cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-cyclopropylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.99 (m, 2H), 1.40 (m, 2H), 2.21 (s, 3H), 2.71 (s, 3H), 3.06(m, 1H), 6.61 (d, 1H, J=9.6 Hz), 7.02 (m, 2H), 7.24 (m, 1H), 7.34 (d,1H, J=9.6 Hz), LC MS (m/e)=342 (MH+).

Example 41

8-sec-Butyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-sec-butylamino-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-sec-butyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ0.89 (m, 3H), 1.70 (m, 3H), 2.06-2.42 (m, 2H), 2.21 (s, 3H),2.65 (s, 3H), 5.80 (m, 1H), 6.61 (d, 1H, J=9.7 Hz), 7.03 (m, 2H), 7.24(m, 1H), 7.39 (d, 1H, J=9.7 Hz). LC MS (m/e)=328 (MH+).

Example 42

4-(4-Fluoro-2-methyl-phenyl)-8-isopropyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(4-fluoro-2-methylphenyl)-6-isopropylamino-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound4-(4-fluoro-2-methyl-phenyl)-8-isopropyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 1.68 (m, 6H), 2.21 (s, 3H), 2.70 (s, 3H), 5.95 (m, 1H), 6.60(d, 1H, J=9.6 Hz), 6.95-7.11 (m, 2H), 7.18-7.32 (m, 2H). LC MS (m/e)=344(MH+).

Example 43

8-(2,6-Difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(2,6-difluoro-phenylamino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-(2,6-Difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=400 (MH+). Rt=2.42 min.

Example 44

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(2-chloro-phenyl)-6-(1-ethyl-propylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ0.85 (m, 6H), 2.01 (m, 4H), 2.26-2.44 (m, 2H), 2.63 (s, 3H),5.39 (m, 0.5H), 5.75 (m, 0.5H), 6.62 (br d, 1H, J=9.6), 7.31-7.60 (m,5H). LC MS (m/e)=482 (MH+).

Example 45

4-(4-Fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 29 starting from4-(4-fluoro-2-methyl-phenyl)-6-(2-fluoro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound4-(4-fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 2.19 (s, 3H), 2.28 (s, 3H), 6.76 (d, 1H, J=9.6 Hz),7.05 (m, 2H), 7.24-7.40 (m, 4H), 7.51 (m, 2H); LC MS (m/e)=396 (MH+).

Example 46

2-Methanesulfonyl-4,8-diphenyl-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of 2-methylsulfanyl-4,8-diphenyl-8H-pyrido[2,3-d]pyrimidin-7-one (70 mg, 0.2 mmol) in dichloromethane (5mL) was added 3-chloroperoxybenzoic acid (109 mg, 0.6 mmol, 3 eq) andthe reaction mixture was stirred 2 h at 23°, solvent was evaporated andthe yellow residue purified by Flash chromatography to afford2-methanesulfonyl-4,8-diphenyl-8H -pyrido[2,3-d]pyrimidin-7-one (55 mg,71% yield). ¹H-NMR (CDCl₃) δ 2.96 (s, 3H), 6.89 (d, 1H, J=9.8 Hz), 7.26(m, 2H), 7.40-7.81 (m, 8H), 8.01 (d, 1H, J=9.8 Hz), LC MS (m/e)=378(MH+).

Example 47

4,8-Bis-(2-chloro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of4,8-bis-(2-chloro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one(414 mg, 1 mmol) in CHCl₃ (15 mL) was added 3-chloro-peroxybenzoic acid(549 mg, 3 mmol, 3 eq) and the reaction mixture was stirred 5 h at 23°,then 1 M aq Na₂CO₃ (10 mL) was added, the layers were separated, and theorganic layer was washed with H₂O, dried (MgSO₄) and the solvent wasevaporated to afford4,8-bis-(2-chloro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one(550 mg, 89% yield). ¹H-NMR (CDCl₃) δ 3.15 (s, 3H), 6.96 (d, 1H, J=9.8Hz), 7.26 (m, 2H), 7.51-7.80 (m, 9H). LC MS (m/e)=446 (MH+).

Example 48

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methane-sulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=446 (MH+). Rt=2.13 min.

Example 49

4,8-Bis-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from4,8-bis-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound4,8-bis-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=414 (MH+). Rt=1.96 min.

Example 50

8-Cyclopropylmethyl-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-cyclopropylmethyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-cyclopropylmethyl-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=374 (MH+). Rt=1.90 min

Example 51

8-sec-Butyl-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-sec-butyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-sec-butyl-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=376 (MH+). Rt=1.95 min

Example 52

4-(2-Fluoro-phenyl)-8-isopropyl-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from4-(2-fluoro-phenyl)-8-isopropyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound4-(2-fluoro-phenyl)-8-isopropyl-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=362 (MH+). Rt=1.85 min.

Example 53

8-Cyclopropylmethyl-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-cyclopropylmethyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-cyclopropylmethyl-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=388 (MH+). Rt=2.13 min.

Example 54

8-Cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=374 (MH+). Rt=1.79 min.

Example 55

8-sec-Butyl-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-sec-butyl-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-sec-butyl-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=390 (MH+). Rt=2.05 min.

Example 56

4-(4-Fluoro-2-methyl-phenyl)-8-isopropyl-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from4-(4-fluoro-2-methyl-phenyl)-8-isopropyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound4-(4-fluoro-2-methyl-phenyl)-8-isopropyl-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=376 (MH+). Rt=2.00 min.

Example 57

8-(2,6-Difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=432 (MH+). Rt=2.04 min.

Example 58

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=406 (MH+). Rt=2.15 min.

Example 59

4-(4-Fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from4-(4-fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound4-(4-fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one;LC MS (m/e)=428 (MH+). Rt=2.04 min.

Example 60

2-(2-Diethylamino-ethylamino)-4,8-diphenyl-8H-pyrido[2,3-d]pyrimidin-7-one

A solution of the product of Example 46 (18.8 mg, 0.05 mmol), NMP (5 mL)and N,N-diethylethylenediamine (28 mg, 0.25 mmol, 5 eq) was heated to50°. After 1 h, H₂O (20 mL) was added and then EtOAc (20 mL). The layerswere separated. The organic layer was washed with satd aq NaCl, dried(MgSO₄) filtered and the solvent was evaporated in vacuo. The yellowresidue was purified by Flash chromatography to afford2-(2-diethylamino-ethylamino)-4,8-diphenyl-8H-pyrido[2,3-d]pyrimidin-7-one(21 mg, 89% yield). ¹H-NMR (CDCl₃) δ 0.74-0.98 (m, 6H), 2.28-2.56 (m,8H), 2.98 (br s, 1H), 6.32 (d, 1H, J=9.8 Hz), 7.26 (m, 2H), 7.09-7.88(m, 11H), LC MS (m/e)=414 (MH+).

Example 61

2-(2-Diethylamino-ethylamino)-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48, and N,N-diethylenediamine were reacted by theprocedure of Example 60 to afford the title compound2-(2-diethylamino-ethylamino)-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 0.96 (m, 6H), 2.24 (s, 3H), 2.50 (m, 6H), 3.14 (m, 2H),6.02 (br s, 1H), 6.36 (d, 1H, J=9.6 Hz), 7.08 (m, 4H), 7.24 (m, 2H),7.49 (m, 1H). LC MS (m/e)=482 (MH+).

Example 62

4,8-Bis-(2-chloro-phenyl)-2-(2-diethylamino-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and N,N-diethylenediamine were reacted by theprocedure of Example 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(2-diethylamino-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 0.97 (m, 6H), 2.49 (s, 6H), 3.12 (m, 2H), 6.00 (br s,1H), 7.18-7.63 (m, 9H). LC MS (m/e)=482 (MH+).

Example 63

8-(2-Chloro-phenyl)-2-(2-diethylamino-ethylamino)-4-(2-fluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-onea)8-(2-Chlorophenyl)-4-(2-fluorophenyl)-2-methanesulfonyl-8-H-pyrido[2,3d]-pyrimidine-7-one

Prepared as described above in Example 47 starting from the product ofExample 33 to afford the title compound.

b)8-(2-Chloro-phenyl)-2-(2-diethylamino-ethylamino)-4-(2-fluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 60 starting from the product ofExample 63(a) to afford the title compound8-(2-choro-phenyl)-2-(2-diethylamino-ethylamino)-4-(2-fluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 0.99 (m, 6H), 2.49 (s, 6H), 3.16 (m, 2H), 6.03 (br s,1H), 7.13-7.63 (m, 914). LC MS (m/e)=466 (MH+).

Example 64

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one(800 mg, 1.8 mmol) in 1-methyl-2-pyrrolidinone (8 mL) was added serinol(819 mg, 9 mmol, 5 eq) and the reaction mixture was heated to 50°. After1 h, H₂O (20 mL) was added, followed by Et₂O (20 mL) and EtOAc (20 mL).The layers were separated. The organic layer was washed with satd aqNaCl, dried (MgSO₄), filtered and the solvent was evaporated. The yellowresidue was then purified by Flash chromatography to afford8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one(750 mg, 92% yield). ¹H-NMR (CDCl₃) δ 2.30 (s, 3H), 3.67 (m, 1H), 3.88(m, 4H), 6.30 (br s, 1H), 6.41(d, 1H, J=9.6 Hz), 7.08 (m, 4H), 7.24 (m,1H), 7.31 (d, 1H, J=9.6 Hz), 7.49 (m, 1H). LC MS (m/e)=457 (MH+).

Example 65

4,8-Bis-(2-chloro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and serinol were reacted by the procedure ofExample 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 3.44 (m, 1H), 3.68 (m, 4H), 6.30 (br s, 1H), 6.48 (d,1H, J=9.7 Hz), 7.24-7.65 (m, 9H). LC MS (m/e)=457 (MH+).

Example 66

4-(2-Fluoro-phenyl)-8-(1-ethyl-propyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

4-(2-Fluorophenyl)-8-(1-ethylpropyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one,and serinol were reacted by the procedure of Example 60 to afford thetitle compound4-(2-fluoro-phenyl)-8-(1-ethyl-propyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.82 (m, 6H), 1.32 (m, 4H), 1.90 (m, 2 H), 2.32 (m, 2H), 3.71(m, 2H), 4.24 (m, 1H), 5.38 (m, 0.5H), 5.69 (m, 0.5H), 5.71 (br s, 1H),6.30 (br d, 1H, J=9.6), 7.13 (d, 1H, J=9.6 Hz), 7.30-7.55 (m, 4H). LC MS(m/e)=401 (MH+)

Example 67

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 58, and serinol were reacted by the procedure ofExample 60 to afford the title compound4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.84 (m, 6H), 1.91 (m, 2H), 2.32 (m, 2H), 3.02 (m, 21i), 3.95(m, 4H), 4.14 (m, 1H), 5.30 (m, 0.5H), 5.52 (m, 0.5H), 6.28 (br d, 1H,J=9.6), 6.40 (br s, 1H), 7.12 (d, 1H, J=9.6 Hz), 7.30-7.58 (m, 4H). LCMS (m/e)=417 (MH+).

Example 68

4-(2-Fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-isopropyl-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 52, and serinol were reacted by the procedure ofExample 60 to afford_the title compound4-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-isopropyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 1.54 (m, 6H), 3.80 (m, 4H), 4.11 (m, 1H), 5.75 (m, 1H), 6.19(d, 1H, J=9.8), 6.38 (br s, 1H), 7.01-7.21 (m, 2H), 7.30-7.49 (m, 3H).LC MS (m/e)=373 (MH+).

Example 69

8-Cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 54, and serinol were reacted by the procedure ofExample 60 to afford_the title compound8-cyclopropyl-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.85 (m, 2H), 1.28 (m, 2H), 2.11 (m, 3H), 2.79 (m, 1H), 3.89(m, 4H), 4.16 (m, 1H), 6.18 (d, 1H, J=9.8), 6.31 (br s, 1H), 6.85-7.14(m, 4H). LC MS (m/e)=385 (MH+).

Example 70

8-Cyclopropylmethyl-4-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 50, and serinol were reacted by the procedure ofExample 60 to afford_the title compound8-cyclopropylmethyl-4-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.40 (m, 4H), 1.25 (m, 1H), 3.89 (m, 4H), 4.13 (m, 3H), 5.75(m, 1H), 6.30 (d, 1H, J=9.8 Hz), 6.59 (br s, 1H), 7.08-7.48 (m, 5H). LCMS (m/e)=385 (MH+).

Example 71

8-sec-Butyl-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 55, and serinol were reacted by the procedure ofExample 60 to afford_the title compound8-sec-butyl-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethylethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.80 (m, 3H), 1.37(m, 3H), 2.21 (m, 3H), 2.73 (m, 2H), 3.96 (m, 4H), 4.20 (m, 1H), 5.52(m, 1H), 6.29 (m, 1H), 6.59 (br s, 1H), 6.91-7.40 (m, 4H). LC MS(m/e)=401 (MH+).

Example 72

4-(4-Fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59, and serinol were reacted by the procedure ofExample 60 to afford_the title compound4-(4-fluoro-2-methyl-phenyl)-8-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 2.24 (s, 3H), 2.68 (br s, 2H), 3.42 (m, 1H), 3.61 (m, 4H),6.30 (br s, 1H), 6.38 (d, 1H, J=9.7 Hz), 7.02 (m, 2H), 7.27 (m, 5H),7.46 (m, 1H). LC MS (m/e)=439 (MH+).

Example 73

4,8-Bis-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 49, and serinol were reacted by the procedure ofExample 60 to afford_the title compound4,8-bis-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 2.91 (br s, 2H), 3.39 (m, 1H), 3.55 (m, 4H), 6.05 (br s, 1H),6.33 (d, 1H, J=9.7 Hz), 6.21 (m, 5H), 7.39 (m, 4H). LC MS (m/e)=425(MH+).

Example 74

8-(2,6-Difluoro-phenyl)-4-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 57, and serinol were reacted by the procedure ofExample 60 to afford the title compound,8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 2.52 (br s, 2H), 3.45 (m, 1H), 3.60 (m, 4H), 6.28 (br s, 1H),6.34 (d, 1H, J=9.7 Hz), 6.98 (m, 2H), 7.19 (m, 3H), 7.42 (m, 3H). LC MS(m/e)=443 (MH+).

Example 75

8-Cyclopropylmethyl-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 53, and serinol were reacted by the procedure ofExample 60 to afford the title compound8-cyclopropylmethyl-4-(2-fluoro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.46 (m, 4H), 1.32 (m, 1H), 2.18 (s, 3H), 3.31 (br s, 2H),3.89 (m, 4H), 4.15 (m, 3H), 6.30 (d, 1H, J=9.8 Hz), 6.59 (br s, 1H),6.97 (m, 2H), 7.19 (m, 2H). LC MS (m/e)=399 (MH+).

Example 76

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-isopropyl-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 56, and serinol were reacted by the procedure ofExample 60 to afford the title compound4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-isopropyl-8H-pyrido[2,3-d]pyrimidin-7-one¹H-NMR: δ 1.61 (m, 6H), 2.15 (m, 3H), 3.45 (br s, 2H), 3.85 (m, 5H),5.74 (m, 1H), 6.21 (d, 1H, J=9.8Hz), 6.36 (br s, 1H), 6.91-7.20 (m, 4H).LC MS (m/e)=387 (MH+).

Example 77

4,8-Bis-(2-chloro-phenyl)-2-(2-dimethylamino-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and N,N-dimethylethylenediamine were reactedby the procedure of Example 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(2-dimethylamino-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one(396 mg, 84% yield). ¹H-NMR (CDCl₃) δ 2.02-2.34 (m, 8H), 3.05 (m, 2H),6.02 (br s, 1H), 6.39 (d, 1H, J=9.8 Hz), 7.24-7.62 (m, 9H). LC MS(m/e)=455 (MH+).

Example 78

4,8-Bis-(2-chloro-phenyl)-2-(piperidin-4-ylamino)-8H-pyridopyrimidin-7-one

The product of Example 47, and piperidin-4-ylamine were reacted by theprocedure of Example 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 1.21 (m, 2H), 1.84 (m, 2H), 2.38 (m, 2H), 3.01 (m, 2H),3.30 (m, 1H), 5.36 (s, 1H), 6.40 (d, 1H, J=9.8 Hz), 7.20-7.62 (m, 9H).LC MS (m/e)=466 (MH+).

Example 79

4,8-Bis-(2-chloro-phenyl)-2-(1-methyl-piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and 1-methylpiperidin-4-ylamine were reactedby the procedure of Example 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(1-methyl-piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 1.42 (m, 2H), 1.79 (m, 4H), 2.25 (s, 3H), 2.75 (m, 2H),3.15 (m, 1H), 5.33 (s, 1H), 6.39 (d, 1H, J=9.8 Hz), 7.24-7.59 (m, 9H).LC MS (m/e)=480 (MH+).

Example 80

4,8-Bis-(2-chloro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-1-methyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and 2-amino-2-methylpropane 1,3-diol werereacted by the procedure of Example 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(2-hydroxy-1-hydroxymethyl-1-methyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 1.01 (s, 3H), 3.43 (m, 2H), 3.62 (m, 2H), 6.03 (br s,1H), 6.41 (d, 1H, J=9.6 Hz), 7.27-7.65 (m, 9H). LC MS (m/e)=471 (MH+).

Example 81

4,8-Bis-(2-chloro-phenyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and 2-aminoethanol were reacted by theprocedure of Example 60 to afford the title compound4,8-bis-(2-chloro-phenyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 3.17 (m, 2H), 3.48 (m, 2H), 6.08 (br s, 1H), 6.45 (d,1H, J=9.6 Hz), 7.26-7.67 (m, 9H). LC MS (m/e)=427 (MH+).

Example 82

2-(2-Amino-ethylamino)-4,8-bis-(2-chloro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 47, and 1,2-diaminoethane were reacted by theprocedure of Example 60 to afford the title compound2-(2-amino-ethylamino)-4,8-bis-(2-chloro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 2.59 (m, 2H), 3.11 (m, 2H), 5.91 (br s, 1H), 6.40 (d,1H, J=9.6 Hz), 7.25-7.61 (m, 9H). LC MS (m/e)=426 (MH+).

Example 83

[4,8-Bis-(2-chloro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid ethyl ester

The product of Example 47, and ethyl glycinate were reacted by theprocedure of Example 60 to afford the title compound[4,8-bis-(2-chloro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid ethyl ester. ¹H-NMR (CDCl₃) δ 1.21 (m, 3H), 3.59 (m, 2H), 4.12 (m,2H), 5.91 (br s, 1H), 6.41 (m, 2H), 7.25-7.62 (m, 9H). LC MS (m/e)=469(MH+). Rt=2.12 min

Example 84

[4,8-Bis-(2-chloro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid

To a solution of the product of Example 83 (20 mg, 0.43 mmol) in THF (2mL) was added LiOH (40 mg, 1.67 mmol) dissolved in H₂O (1 mL). Thereaction mixture was stirred 1 h at 23° and then neutralized with 1 MHCl, extracted with EtOAc (5 mL) and the layers were separated. Theorganic layer was washed with H₂O, satd. aq NaCl, and dried (MgSO₄). Thesolution was filtered and evaporated to give the title compound[4,8-bis-(2-chloro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid. LC MS (m/e)=441 (MH+). Rt=1.85 min

Example 85

4-(2-Chloro-phenyl)-2-(2-diethylamino-ethylamino)-8-(1-ethyl-propyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 44, and N,N-diethylethylenediamine were reactedby the procedure of Example 60 to afford4-(2-chloro-phenyl)-2-(2-diethylamino-ethylamino)-8-(1-ethyl-propyl)-8H-pyrido[2,3-d]pyrimidin-7-one(371 mg, 80% yield. LC MS (m/e)=442 (MH+). Rt=1.77 min

Example 86

2-(2-Amino-ethylamino)-4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 44, and 1,2-diaminoethane were reacted by theprocedure of Example 60 to afford2-(2-amino-ethylamino)-4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (ride)=386 (MH-F). Rt=1.54 min

Example 87

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 44, and 2-aminoethanol were reacted by theprocedure of Example 60 to afford the title compound4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=387 (MH+). Rt=1.94 min

Example 88

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-2-((R)-2-hydroxy-1-methyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 44, and (R)-2-aminopropan-1-ol were reacted bythe procedure of Example 60 to afford the title compound4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-((R)-2-hydroxy-1-methyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR: δ 0.81 (m, 6H), 1.30 (m, 2H), 1.96 (m, 2H), 2.36 (m, 2H), 3.71(m, 2H), 4.25(m, 1H), 5.31 (m, 0.5H), 5.56 (m, 0.5H), 5.71 (br s, 1H),6.26 (br d, 1H, J=9.6), 7.12 (d, 1H, J=9.6 Hz), 7.30-7.54 (m, 4H). LC MS(m/e)=401 (MH+). Rt=2.07 min

Example 89

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-2-(1-methyl-piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 44, and 1-methylpiperidin-4-ylamine were reactedby the procedure of Example 60 to afford the title compound4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-2-(1-methyl-piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=440 (MH+). Rt=1.67 min

Example 90

4-(2-Chloro-phenyl)-8-(1-ethyl-propyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid ethyl ester

The product of Example 44, and ethyl glycinate were reacted by theprocedure of Example 60 to afford the title compound[4-(2-chloro-phenyl)-8-(1-ethyl-propyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid ethyl ester. LC MS (m/e)=429 (MH+). Rt=2.49 min

Example 91

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48, and 2-aminoethanol were reacted by theprocedure of Example 60 to afford the title compound8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 2.26 (s, 3H), 3.18 (m, 2H), 3.53 (m, 2H), 3.70 (br s,1H), 6.21 (br s, 1H), 6.40 (d, 1H, J=9.7 Hz), 7.09 (m, 4H), 7.21-7.65(m, 3H). LC MS (m/e)=427 (MH+). Rt=1.96 min

Example 92

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1-methyl-piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48, and 1-methylpiperidin-4-ylamine were reactedby the procedure of Example 60 to afford the title compound8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1-methyl-piperidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ1.45 (m, 2H), 1.85 (m, 4H), 2.40 (s, 3H), 2.72 (m, 2H),3.30 (m, 1H), 5.41 (m, 1H), 6.38 (d, 1H, J=9.7 Hz), 7.05 (m, 4H), 7.29(m, 3H). LC MS (m/e)=480 (MH+). Rt=1.67 min

Example 93

N-(7-Oxo-4,8-diphenyl-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl)-methanesulfonamide

To a solution of methylsulfonamide (200 mg, 2 mmol, 4 eq) in DMF (2 mL)was added NaH (80 mg, 2 mmol, 60% dispersion in mineral oil, 4 eq) andthe reaction mixture was stirred for 30 min at 23°. To this solution wasadded a solution of 2-methanesulfonyl-4,8-diphenyl-8H-pyrido[2,3-d]pyrimidin-7-one (190 mg, 0.5 mmol) in DMF (1 mL) and themixture was heated to 50°. After 1 h, H₂O (10 mL) was added and thenEt₂O (10 mL), the layers were separated, and the organic layer waswashed with satd aq NaCl, dried (MgSO₄), filtered and the solvent wasevaporated. The yellow residue was then purified by Flash chromatographyto affordN-(7-oxo-4,8-diphenyl-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl)-methanesulfonamide(101 mg, 51% yield). ¹H-NMR (CDCl₃) δ 2.82 (s, 3H), 6.69 (d, 1H, J=9.8Hz), 7.31 (m, 2H), 7.59 (m, 8H), 7.91 (d, 1H, J=9.8 Hz), LC MS (m/e)=393(MH+).

Example 94

N-[4,8-Bis-(2-fluoro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide

The product of Example 49, was reacted by the procedure of Example 93 toafford the title compoundN-[4,8-bis-(2-fluoro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide.¹H-NMR (CDCl₃) δ 2.81 (s, 3H), 6.66 (d, 1H, J=9.6 Hz), 7.24 (m, 4H),7.48 (m, 4H), 7.87 (d, 1H, J=9.8 Hz), LC MS (m/e)=429 (MH+). Rt=1.84 min

Example 95

N-[4-(2-Fluoro-phenyl)-8-isopropyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide

The product of Example 52, was reacted by the procedure of Example 93 toafford the title compoundN-[4-(2-fluoro-phenyl)-8-isopropyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide.¹H-NMR (CDCl₃) δ1.68 (m, 6H), 3.52 (s, 3H), 5.82 (m, 1H), 6.68 (d, 1H,J=9.6 Hz), 7.21-7.61 (m, 5H). LC MS (m/e)=377 (MH+). Rt=1.83 min

Example 96

N-[8-(2,6-Difluoro-phenyl)-4-(2-fluoro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide

The product of Example 56, was reacted by the procedure of Example 93 toafford the title compoundN-[8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide.¹H-NMR (CDCl₃) δ 3.08 (s, 3H), 6.72 (d, 1H, J=9.6 Hz), 7.20 (m, 2H),7.39 (m, 3H), 7.74 (m, 3H), LC MS (m/e)=447 (MH+). Rt=1.84 min

Example 97

N-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide

The product of Example 48, was reacted by the procedure of Example 93 toafford the title compoundN-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide.¹H-NMR (CDCl₃) δ 2.29 (s, 3H), 3.04 (s, 3H), 6.69 (d, 1H, J=9.6 Hz),7.16 (m, 4H), 7.59 (m, 3H). LC MS (m/e)=461 (MH+). Rt=1.90 min

Example 98

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of the product of Example 30 (90 mg, 0.2 mmol) in methanol(5 mL) was added sodium methoxide (1 mL of 25% w/w solution in methanol,excess). The reaction mixture turned yellow and was heated under refluxfor 2 h evaporated and H₂O (5 mL), then EtOAc (20 mL), was added. Thelayers were separated. The organic layer was washed with satd aq NaCl,dried (MgSO₄), filtered and evaporated. The yellow residue was thenpurified by Flash chromatography to afford 71 mg (83% yield) of8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 2.30 (s, 3H), 3.82 (s, 3H), 6.61 (d, 1H, J=9.7 Hz),7.01-7.18 (m, 4H), 7.25 (m, 1H), 7.52 (m, 2H); LC MS (m/e)=398 (MH+).

Example 99

8-(2,6-Difluoro-phenyl)-2-ethoxy-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared by the procedure of Example 98 using sodium ethoxide to affordthe title compound8-(2,6-difluoro-phenyl)-2-ethoxy-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 1.26 (m, 3H), 2.30 (s, 3H), 4.22 (m, 2H), 6.60 (d, 1H,J=9.6 Hz), 6.98-7.20 (m, 4H), 7.25 (m, 1H), 7.51 (m, 2H), LC MS(m/e)=412 (MH+).

Example 100

2-Butoxy-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared by the procedure of Example 98 using sodium butoxide to affordthe title compound2-butoxy-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 0.87 (m, 3H), 1.31 (m, 2H), 1.65 (m, 2H), 2.27 (s, 3H),4.16 (m, 2H), 6.58 (d, 1H, J=9.6 Hz), 6.95-7.21 (m, 4H), 7.25 (m, 1H),7.52 (m, 2H), LC MS (m/e)=440 (MH+).

Example 101

8-(2-Chloro-phenyl)-4-(2-fluoro-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 98 starting from(E)-3-[4-(2-chloro-phenylamino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid methyl ester and sodium methoxide to afford the title compound8-(2-chloro-phenyl)-4-(2-fluoro-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 3.70 (s, 3H), 6.59 (d, 1H, J=9.7 Hz), 7.01-7.20 (m,3H), 7.40 (m, 2H), 7.56 (m, 4H); LC MS (m/e)=382 (MH+). Rt=2.24 min

Example 102

4,8-Bis-(2-chloro-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 98 starting from(E)-3-[4-(2-chloro-phenylamino)-6-(2-chloro-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid methyl ester and sodium methoxide to afford the title compound4,8-bis-(2-chloro-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 3.71 (s, 3H), 6.55 (d, 1H, J=9.6 Hz), 7.24-7.60 (m,9H). LC MS (m/e)=398 (MH+). Rt=2.27 min

Example 103

8-(2,6-Difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 98 starting from(E)-3-[4-(2,6-difluoro-phenylamino)-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylic acidmethyl ester and sodium methoxide to afford the title compound8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 3.82 (s, 3H), 6.56 (d, 1H, J=9.6 Hz), 7.08 (m, 2H),7.26-7.59 (m, 6H). LC MS (m/e)=384 (MH+). Rt=2.22 min.

Example 104

8-(1-Ethyl-propyl)-4-(4-fluoro-2-methyl-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 98 starting from(E)-3-[4-(1-ethyl-propylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid methyl ester and sodium methoxide to afford the title compound8-(1-ethyl-propyl)-4-(4-fluoro-2-methyl-phenyl)-2-methoxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 0.89 (m, 6H), 2.02 (m, 2H), 2.22 (s, 3H), 2.33 (m, 2H),3.39 (m, 2H), 4.09 (s, 3H), 5.35 (m, 0.5H), 5.62 (m, 0.5H), 6.41 (br d,1H, J=9.6 Hz), 7.03 (m, 2H), 7.28 (m, 2H). LC MS (m/e)=356 (MH+).Rt=2.50 min.

Example 105

4,8-Bis-(2-chloro-phenyl)-2-(2-hydroxy-ethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 98 starting from(E)-3-[4-(2-chloro-phenylamino)-6-(2-chloro-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-acrylicacid methyl ester and ethylene glycol sodium salt to afford the titlecompound4,8-bis-(2-chloro-phenyl)-2-(2-hydroxy-ethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃) δ 3.81 (m, 2H), 4.23 (m, 2H), 5.62 (m, 0.5 H), 6.65 (d,1H, J=9.6 Hz), 7.29-7.58 (9H). LC MS (m/e)=428 (MH+). Rt=1.85 min

Example 106

4-Amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde

To a solution of the product of Example 17 (217 mg, 1.07 mmol) indioxane (21 mL) and H₂O (7 mL) was added anhydrous K₂CO₃ (443 mg, 3.21mmol, 3 eq) followed by 2-fluorophenylboronic acid (218 mg, 1.6 mmol,1.5 eq). The reaction mixture was degassed andtetrakis(triphenylphophine)palladium (61 mg, 0.053 mmol, 0.05 eq) wasadded, and heated under reflux 24 h, cooled to 23°. The layers wereseparated. EtOAc (50 mL), followed by H₂O (10 mL), was added and theorganic layer was separated, washed with satd aq NaCl, dried (MgSO₄),filtered, and the solvent was evaporated. The residue was purified byHash chromatography (1:20 EtOAc:hexane to afford 180 mg (72% yield) ofpure4-amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde.¹H-NMR δ 2.58 (s, 3H), 5.80 (br s, 1H), 7.16 (m, 1H), 7.28 (m, 1H), 7.59(m, 2H), 8.68 (br s, 1H), 9.71 (s, 1H), LC MS (m/e)=264 (MH+). Rt=1.89min

Example 107

4-(2-Fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

A solution of 18-crown-6 (422 mg, 1.6 mmol, 5 eq) andbis(2,2,2-trifluoroethyl)(methoxycarbonylmethyl)phosphonate (81 uL, 0.38mmol, 1.2 eq) in anhyd THF (20 mL) was cooled to −78°, potassiumbis(trimethylsilyl)amide (0.96 mL, 0.48 mmol, 1.5 eq) as a 0.5 molsolution in toluene was added. This solution was stirred for additional30 min at −78° and4-amino-6-(2-fluoro-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehyde(85 mg, 0.32 mmol) in dry THF (1 mL) was added dropwise. The reactionmixture was then stirred for 8 h at −78° and warmed to 23°, and stirred16 h. Saturated aq NH₄Cl (5 mL), followed by Et₂O (20 mL), was added.The layers were separated. The organic layer was washed with satd aqNaCl, dried (MgSO₄), filtered and solvent was evaporated. The yellowresidue was purified by Flash chromatography to afford 100 mg (91%yield) of4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR δ 2.62 (s, 3H), 6.55 (d, 1H, J=9.9 Hz), 7.26 (m, 3H), 7.52 (m,2H), 8.99 (br s, 1H). LC MS (m/e)=288 (MH+). Rt=1.75 min.

Example 108

4-(2-Fluoro-phenyl)-8-methyl-2-methylsulfanyl-8H-pyrido2,3-d]pyrimidin-7-one

To a solution of4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one(120 mg, 0.42 mmol) in 20 mL of anhyd THF was added NaH (50 mg, 1.2mmol, 60% dispersion in mineral oil, 3 eq) followed by iodomethane (74μL, 1.2 mmol, 3 eq). The reaction mixture was stirred 1 h at 23°,quenched with saturated aq NH₄Cl. (20 mL), Et₂O (100 mL) was added andthe layers were separated. The organic layer was washed with satd aqNaCl, dried (MgSO₄), filtered and evaporated. The yellow residue wasthen purified by Flash chromatography to afford 100 mg (92% yield) of4-(2-Fluoro-phenyl)-8-methyl-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR δ 2.68 (s, 3H), 3.81 (s, 3H), 6.61 (d, 1H, J=9.8 Hz), 7.22 (m,3H), 7.50 (m, 3H). LC MS (m/e)=302 (MH+). Rt=2.17 min.

Example 109

8-Ethyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 108 starting from4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one andiodoethane to afford the title compound8-ethyl-4-(2-fluoro-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=316 (MH+). Rt=2.29 min

Example 110

4-(2-Chloro-phenylamino)-2-methylsulfanyl-6-phenoxy-pyrimidine-5-carbaldehyde

To a solution of4-chloro-6-(2-chloro-phenylamino)-2-methylsulfanyl-pyrimidine-5-carbaldehyde(315 mg, 1 mmol) in 10 mL of anhyd DMSO was added NaH (50 mg, 1.2 mmol,60% dispersion in mineral oil, 1.2 eq) followed by phenol (112 mg, 1.2mmol, 1.2 eq). The reaction mixture was stirred for 1 h 23°, quenchedwith H₂O (20 mL), Et₂O (100 mL) was added and the layers were separated.The organic layer was washed with satd aq NaCl, dried (MgSO₄) filteredand solvent was removed in vacuo. The yellow residue was then purifiedby Flash chromatography to afford 120 mg (45% yield) of4-(2-chloro-phenylamino)-2-methylsulfanyl-6-phenoxy-pyrimidine-5-carbaldehyde.¹H-NMR δ 2.32 (s, 3H), 7.01-7.49 (m, 8H), 8.51 (d, 1H, J=7.2 Hz), 10.49(s, 1H), 11.58 (br s, 1H). LC MS (m/e)=372 (MH+). Rt=2.94 min.

Example 111

8-(2-Chloro-phenyl)-2-methylsulfanyl-4-phenoxy-8H-pyrido[2,3-d]pyrimidin-7-one

A solution of 18-crown-6 (422 mg, 1.6 mmol, 5 eq) andbis(2,2,2-trifluoroethyl)(methoxycarbonylmethyl)phosphonate (81 μL, 0.38mmol, 1.2 eq) in anhyd THF (20 mL) was cooled to −78°. To this solutionwas added potassium bis(trimethylsilyl)amide (0.96 mL, 0.48 mmol, 1.5eq) as a 0.5 mol solution in toluene. This solution was stirred foradditional 30 min at −78° and4-(2-chloro-phenylamino)-2-methylsulfanyl-6-phenoxy-pyrimidine-5-carbaldehyde(119 mg, 0.32 mmol) in dry THF (1 mL) was added dropwise. The reactionmixture was then stirred for 8 h at −78° and warmed to 23° and stirred16 h. Saturated aq NH₄Cl (5 mL), followed by Et₂O (20 mL), was added.The layers were separated. The organic layer was washed with satd aqNaCl, dried (MgSO₄) filtered and solvent was removed in vacuo. Theyellow residue was then purified by Flash chromatography to give 100 mg(91% yield) of pure8-(2-chloro-phenyl)-2-methylsulfanyl-4-phenoxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR δ 1.89 (s, 3H), 6.55 (d, 1H, J=9.9 Hz), 7.18 (m, 4H), 7.28 (m,4H), 7.44 (m, 1H), 7.98 (d, 1H, J=9.9 Hz). LC MS (m/e)=396 (MH+).Rt=2.68 min.

Example 112

2-Amino-8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one(432 mg, 1 mmol) in 1-methyl-2-pyrrolidinone (5 mL) was added NaNH₂ (195mg, 5 mmol, 5 eq) and the mixture was heated to 50°. After 1 h, H₂O (20mL) was added then Et₂O (20 mL) The layers were separated. The organiclayer was washed with satd aq NaCl, dried (MgSO₄), filtered and solventwas removed in vacuo. The yellow residue was then purified by Flashchromatography to afford2-amino-8-(2,6-difluoro-phenyl)-4-(2-fluoro-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one(100 mg, 53% yield). ¹H-NMR (CDCl₃) δ 5.51 (br s, 2H), 6.42 (d, 1H,J=9.8 Hz), 7.08 (m, 2H), 7.30 (m, 2H), 7.50 (m, 4H), LC MS (m/e)=369(MH+). Rt=1.77 min

Example 113

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-onea)3-[4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-propionicacid methyl ester

To a solution of SmI₂ in THF (0.1M) (Aldrich) (15 mL, 1 5 mmol) and MeOH(3 mL) was added the product of Example 30 (100 mg, 0.22 mmol) and thereaction mixture maintained its blue color. The presence of new productand the disappearance of starting material was indicated by hplc. After30 min, the reaction was diluted with H₂O (10 mL), then 1 M HCl (3 mL),followed by EtOAc (20 mL), the layers were shaken together andseparated. The aq phase was washed with EtOAc (20 mL) and the combinedEtOAc was dried (MgSO₄) and the solvent was evaporated in vacuo and theresidue was crystalized from i-PrOH/H₂O (1:1) to afford3-[4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-propionicacid methyl ester. LC MS (m/e)=448.2 (MH+), Rt=2.17 min.

b)8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-one

To a solution of3-[4-(2,6-difluoro-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidin-5-yl]-propionicacid methyl ester (45 mg, 0.1 mmol) in methanol (5 mL) was added asolution of sodium methoxide (0.5 mL) and the reaction mixture washeated under reflux for 1 h. The reaction mixture was then evaporated,and EtOAc (20 mL) followed by H₂O (10 mL) were added. Layers wereseparated, organic washed with satd aq NaCl, dried (MgSO₄), filtered andthe solvent was evaporated. Dichloromethane (5 mL) was added followed by0.5 mL of oxalyl chloride and 0.1 mL of Et₃N. The reaction mixture wasthen stirred for 2 h at 23°, H₂O (5 mL) was then added followed bydichloromethane (15 mL). Layers were separated, organic layer was washedwith sat'd aq. NaCl, dried (MgSO₄), filtered and solvent was evaporated.The yellow residue was purified by Flash chromatography to give 11.2 mg(21% yield) of pure8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 2.20 (s, 3H), 2.29 (s, 3H), 3.85 (m, 4H), 7.02 (m,4H), 7.21 (m, 1H), 7.42 (m, 1H). LC MS (m/e)=416.2 (MH+). Rt=2.44 min.

Example 114

2-(2-Diethylamino-ethylamino)-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 113(b), and N,N-diethylenediamine were reacted bythe procedure of Example 60 to afford the title compound2-(2-diethylamino-ethylamino)-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-5,8-dihydro-6H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 1.01 (m, 6H), 2.01-2.80 (m, 11H), 6.89-7.40 (m, 6H).LC MS (m/e)=484.2 (MH+). Rt=1.80 min

Example 115

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8-isopropyl-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 56 and 2-aminoethanol were reacted by theprocedure of Example 60 to afford the title compound4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8-isopropyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 1.78 (m, 6H), 2.29 (s, 3H), 3.70 (br s, 2H), 3.89 (brs, 3H), 5.81 (m 1H), 6.02 (br s, 1H), 6.23 (d, 1H, J=9.7 Hz), 7.00 (m,2H). 7.11 (d, 1H, J=9.7 Hz), 7.19 (m, 1H), LC MS (m/e)=357.2 (MH+).Rt=1.80 min.

Example 116

N-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-N-methyl-methanesulfonamide

To the solution ofN-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamide(92 mg, 0.2 mmol) in anhydrous DMF (2 mL) was added NaH (80 mg of 60%dispersion in mineral oil, 2 mmol, 10 eq) and the reaction mixture wasstirred for 30 minutes at 23°. Iodomethane (280 mg, 2 mmol, 10 eq) wasadded and the reaction mixture was stirred 1 h at 23°. Saturated aqNH₄Cl (5 mL) was added and the reaction mixture was extracted with EtOAc(2×20 mL). Organic layers were combined, washed with satd aq NaCl, dried(MgSO₄), filtered and solvent was evaporated. The yellow residue wasthen purified by Flash chromatography to give 80 mg of pureN-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-N-methyl-methanesulfonamide.¹H-NMR (CDCl₃): δ 2.22 (s, 3H), 2.96 (s, 3H), 3.30 (s, 3H), 6.68 (d, 1H,J=9.8 Hz), 7.02 (m, 4H). 7.213 (m, 1H), 7.42 (m, 2H), LC MS (m/e)=475.4(MH+) Rt=2.25 min.

Example 117

N-[4-(4-Fluoro-2-methylphenyl)-8-isopropyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-N-methylmethanesulfonamide

Prepared as described above in Example 115 starting fromN-[4-(4-fluoro-2-methyl-phenyl)-8-isopropyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-methanesulfonamideto give the title compoundN-[4-(4-fluoro-2-methyl-phenyl)-8-isopropyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-N-methyl-methanesulfonamide.¹H-NMR (CDCl₃): δ 1.75 (d, 6H, J=6.9 Hz), 2.18 (s, 3H), 3.39 (s, 3H),3.53 (s, 3 H), 5.81 (m 1H), 6.40 (d, 1H, J=9.7 Hz), 6.96 (m, 2H), 7.11(m, 1H), 7.21 (d, 1H, J=9.7 Hz), LC MS (m/e)=405.4 (MH+). Rt=2.20 min

Example 118

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-hydroxy-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one(223 mg, 0.5 mmol) in N-methylpyrollidine (5 mL) was added Et₃N (0.1 mL)followed by 2-aminoethanesulfonic acid (200 mg, 1.5 mmol, 3 eq) and thereaction mixture was heated to 50° for 12 h. 1 M aq HCl was then addeddropwise till pH 3. The reaction mixture was then extracted with EtOAc(2×20 mL). Organic layers were combined, washed with satd aq NaCl, dried(MgSO₄), filtered and solvent was evaporated. The yellow residue wasthen purified by flash chromatography to give an oily product, which wasthen recrystalized from methanol:H₂O (3:1) to afford 51 mg of pure8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-hydroxy-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 2.24 (s, 3H), 6.31 (d, 1H, J=9.8 Hz), 7.02 (m, 5H).7.23 (m, 1H), 7.352 (m, 1H), LC MS (m/e)=384.2 (MH+). Rt=1.65 min

Example 119

4-(4-Fluoro-2-methyl-phenyl)-2-methylsulfanyl-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 32 starting from4-(4-Fluoro-2-methyl-phenyl)-2-methylsulfanyl-6-ortho-tolylamino-pyrimidine-5-carbaldehydeto give the title compound4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 2.02 (s, 3H), 2.20 (s, 3H), 2.28 (s, 3H), 6.79 (d, 1H,J=9.7 Hz).7.02 (m, 2H), 7.17 (m, 1H), 7.22 (m, 2H), 7.40 (m, 2H). 7.53(d, 1H, J=9.7 Hz). LC MS (m/e)=392.2 (MH+). Rt=2.40 min

Example 120

8-(2,6-Dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 32 starting from4-(2,6-dimethyl-phenylamino)-6-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-pyrimidine-5-carbaldehydeto give the title compound8-(2,6-dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 2.05 (s, 6H), 2.26 (s, 3H), 2.31 (s, 3H), 6.81 (d, 1H,J=9.7 Hz), 7.02 (m, 2H), 7.17 (m, 5H), 7.51 (d, 1H, J=9.7 Hz). LC MS(m/e)=406.4 (MH+). Rt=2.55 min

Example 121

4-(4-Fluoro-2-methyl-phenyl)-2-methanesulfonyl-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=424.2 (MH+). Rt=2.02 min

Example 122

8-(2,6-Dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 47 starting from8-(2,6-dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylsulfanyl-8H-pyrido[2,3-d]pyrimidin-7-oneto give the title compound8-(2,6-dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one.LC MS (m/e)=438.0 (MH+). Rt=2.07 min

Example 123

8-(2,6-Dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Prepared as described above in Example 60 starting from8-(2,6-dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-oneand 2-aminoethanol to give the title compound8-(2,6-dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 1.92 (s, 61-1), 2.12 (s, 3H), 2.95 (br s, 2H), 3.30(br s, 2H), 3.45 (br s, 1H), 6.31 (d, 1H, J=9,7 Hz), 6.92 (m, 2H), 7.17(m, 5H). LC MS (m/e)=419.4 (MH+). Rt=1.84 min

Example 124

8-(2,6-Dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 122, and serinol were reacted by the procedure ofExample 60 to afford the title compound8-(2,6-dimethyl-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 1.91 (s, 6H), 2.14 (s, 3H), 3.45 (br s, 4H), 3.93 (brs, 1H), 6.20 (br s, 1H), 6.31 (d, 1H, J=9.7 Hz), 6.93 (m, 2H), 7.11 (m,5H). LC MS (m/e)=449.0 (MH+). Rt=1.62 min

Example 125

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 121, and serinol were reacted by the procedure ofExample 60 to afford the title compound4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one.¹H-NMR (CDCl₃): δ 2.09 (s, 3H), 2.26 (s, 3H), 3.73 (br s, 4H), 4.02 (brs, 1H), 6.30 (br s, 1H), 6.41 (d, 1H, J=9.7 Hz), 7.05 (m, 2H), 7.24 (m,6H). LC MS (m/e)=435.2 (MH+). Rt=1.60 min

Example 126

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-ethylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 121 (400 mg, 0.95 mmol) and ethanolamine (0.29mL, 4.73 mmol) in NMP (2 mL) was stirred at 23° for 1 h. The mixture wasdiluted with EtOAc, washed with H₂O, the organic phase was separated,EtOAc was removed in vacuo and the residue was purified by Flashchromatography on silica gel, eluting with EtOAc/hexane/triethylamine(50/50/2, v/v/v), followed by evaporation of solvent to afford a gummyresidue. Trituration with H₂O, gave the title compound compound4-(4-fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-ethylamino)-8-ortho-tolyl-8H-pyrido[2,3-d]pyrimidin-7-oneas a white solid (340 mg, 88%). LC-MS: 405.4 (MH+, m/z), Rt=1.85 min

Example 127

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(3-methylsulfanylpropoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

NaH (12 mg, 0.5 mmol) was added to 3-(methylthio)-1-propanol (0.5 mL)and the mixture was stirred under Ar at 23°. After 5 min, gas evolutionceased, and the product of Example 48 (223 mg, 0.5 mmol) was added in asingle portion. The mixture was stirred for 30 minutes. Most of theexcess 3-(methylthio)-1-propanol was removed in vacuo, and the residuepartitioned between EtOAc and H₂O. The organic phase was washed withH₂O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered and evaporated togive the crude product. Flash chromatography eluted with 10-30%EtOAc/hexane, followed by recrystallization from CH₂Cl₂/hexane gave thetitle compound as a white crystalline solid. mp 127-128°, LC MS m/z=472(MH+) Retention time=2.47 min.

Example 128

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(3-methanesulfonylpropoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

To the product of Example 127 (100 mg, 0.21 mmol) in chloroform (10 mL)was added 80% 3-chloroperoxybenzoic acid (135 mg, 0.63 mmol). Themixture was stirred under Ar at 23° for 2 h, after which time thesolvent was removed in vacuo, and the residue was partitioned betweenEtOAc and 1 M Na₂CO₃. The organic phase was washed with H2O, satd aqNaCl, dried over anhyd Na₂SO₄, filtered and evaporated to give the crudeproduct. Flash chromatography eluted with 0-20% EtOAc/CH₂Cl₂, followedby recrystallization from CH₂Cl₂/hexane gave the title compound as awhite crystalline solid. mp 160-162°, LC MS m/z=504 (MH+) Retentiontime=2.02 min.

Example 129

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(2-hydroxy-1-hydroxymethylethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

1,3-O-Benzylideneglycerol (100 mg, 0.55 mmol) was dissolved in dry THF(5 mL) and stirred under Ar at 23° C. NaH (14 mg, 0.55 mmol) was addedand the mixture stirred for 15 minutes at 23° C., and then cooled to−78°. The product of Example 48 (222 mg, 0.5 mmol) was added, and themixture was allowed to slowly warm to 23°. The solvent was removed invacuo, and the residue was dissolved in acetic acid (2 mL), and H2O (0.5mL) was added. The mixture was heated in an oil bath to 60° C. for threeh, and then the solvents were removed in vacua to give the crudeproduct. The crude product was flash chromatographed twice on silica geleluted with 20-50% EtOAc/CH₂Cl₂ to give the product as a white-amorphoussolid. 104-107° C., LC MS m/z=458 (MH+) Retention time=1.88 min.

Example 130

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[2-(tert-butoxycarbonylamino)ethoxy]-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (445 mg, 1 mmol) and BOC-aminoethanol (177 mg,1.1 mmol) was dissolved in THF (10 mL), and cooled to −78° whilestirring under Ar.NaH (28 mg, 1.1 mmol) was added in a single portion.The mixture allowed to slowly warm to 23°, but the reaction did not goto completion. Additional NaH (10 mg, 0.4 mmol) was added, and thereaction went to completion. The solvent was removed in vacuo, and theresidue was partitioned between EtOAc and H2O. The organic phase waswashed with H2O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered andevaporated to give the crude product. Flash chromatography eluted with0-10% EtOAc/hexane gave the title compound as a white-amorphous solid.mp 103-105°, LC MS m/z=527(MH+) Retention time=2.44 min.

Example 131

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(2-aminoethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 130 (1 g, 1.9 mmol) was dissolved in CH₂Cl₂ (8mL) and stirred under Ar in an ice bath. A chilled solution of 25% TFAin CH₂Cl₂ (40 mL) was added, and the mixture was stirred for 45 min at0° C. The solvents were removed in vacuo, and the residue waspartitioned between EtOAc and a saturated NaHCO₃ solution. The organicphase was washed with H2O, satd aq NaCl, dried over anhyd Na₂SO₄,filtered and evaporated to give the crude product. Flash chromatographyeluted with 0-10% MeOH/CH₂Cl₂ gave the title compound as awhite-amorphous solid. mp 96-99°, LC MS in/z=427 (MH+) Retentiontime=1.52 min.

Example 132

8-(2,6-Difluorophenyl)-4-(4-fluoro-2methylphenyl)-2-(2-acetylaminoethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 131 (61 mg, 0.14 mmol)was dissolved in CH₂Cl₂ (2mL) and stirred at 0° C. under Ar. Triethylamine (0.1 mL) was addedfollowed by the addition of acetic anhydride (0.2 g, 2 mmol). Thereaction was allowed to slowly warm to 23° and stir for 18 h. Thesolvents were removed in vacuo, and the residue was flashchromatographed eluted with 10-30% EtOAc/CH₂Cl₂ to give the titlecompound as a white-amorphous solid. mp 75-79°, LC MS m/z=469 (MH+)Retention time=1.95 min.

Example 133

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(3-hydroxy-2-hydroxymethylpropoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

NaH (15 mg, 0.6 mmol) was added to 2-(hydroxymethyl)-1,3-propanediol inTHF (5 mL). The mixture was allowed to stir at 23° under Ar for 10 minand was then cooled to −78°. The product of Example 48 (224 mg, 0.5mmol) in THF (5 mL) was added at −78° and the mixture allowed to warm to23° and stir for 2 h. The solvents were removed in vacuo, and theresidue was partitioned between EtOAc and H₂O. The organic phase waswashed with H₂O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered andevaporated to give the crude product. Flash chromatography eluted with70% EtOAc/CH₂Cl₂ the title compound as a white-amorphous solid. mp77-81°, LC MS m/z=472 (MH+) Retention time=1.79 min.

Example 134

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(2-methanesulfonyl-aminoethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 131 (100 mg, 0.23 mmol) in CH₂Cl₂ (4 mL) wasstirred under Ar at 23°. Triethylamine (0.1 mL) was added followed bythe addition of a solution of methanesulfonyl chloride (29 mg, 0.25mmol) in CH₂Cl₂ (1 mL). The solvents were removed in vacuo, and theresidue was partitioned between EtOAc and H₂O. The organic phase waswashed with H2O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered andevaporated to give the crude product. Flash chromatography eluted with0-10% EtOAc/CH₂Cl₂ gave the title compound as a white-amorphous solid.mp 95-99°, LC MS m/z=505 (MH+) Retention time=2.02 min.

Example 135

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(2-N-methanesulfonyl-N-methylaminoethoxy)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 134 (20 mg, 0.04 mmol) was dissolved in acetone(2 mL) and stirred under Ar at 23°. Potassium carbonate (7 mg, 0.05mmol) was added, followed by the addition of a solution of iodomethane(6.4 mg, 0.045 mmol) in acetone (1 mL). The mixture was allowed to stirfor 18 h, the solvents were removed in vacuo, and the residue waspartitioned between EtOAc and H₂O. The organic phase was washed withH2O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered and evaporated togive the crude product. Flash chromatography eluted with 0-5%EtOAc/CH₂Cl₂ gave the title compound as a white-amorphous solid. mp89-92°, LC MS m/z=519 (MH+) Retention time=2.2 min.

Example 136

4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-2-(2-hydroxylethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) was dissolved in THF (4ml) and a solution of ethanolamine (115 mg, 1.87 mmol) in THF (1 mL) wasadded. The mixture was stirred under Ar at 23° for 18 h. The solventswere removed in vacuo, and the residue was partitioned between EtOAc andH₂O. The organic phase was washed with H₂O, satd aq NaCl, dried overanhyd Na₂SO₄, filtered and evaporated to give the crude product. Flashchromatography eluted with 0-15% EtOAc/CH₂Cl₂ gave the title compound asa light-yellow amorphous solid. mp 120-124°, LC MS m/z=409 (MH+)Retention time=1.84 min.

Example 137

(S)-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-2-[(1-hydroxyprop-2-yl)amino]-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (200 mg, 0.45 mmol) and (S)-2-amino-1-propanol(75 mg, 1 mmol) were dissolved in THF (10 ml) and stirred under Ar at23° for 10 days. The solvents were removed in vacuo, and the residue waspartitioned between EtOAc and H2O. The organic phase was washed withH2O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered and evaporated togive the crude product. Flash chromatography eluted with 0-15%EtOAc/CH₂Cl₂ gave the title compound as an off-white amorphous solid. mp96-101°, LC MS m/z=441 (MH+) Retention time=2.04 min.

Example 138

(R)-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-2-[(1-hydroxyprop-2-yl)amino]-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (200 mg, 0.45 mmol) and (R)-2-amino-1-propanol(75 mg, 1 mmol) were dissolved in THF (10 ml) and stirred under Ar at23° for 18 h. The solvents were removed in vacuo, and the residue waspartitioned between EtOAc and H₂O. The organic phase was washed withH₂O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered and evaporated togive the crude product. Flash chromatography eluted with 0-15%EtOAc/CH₂Cl₂ gave the title compound as a off-white amorphous solid. mp90-95°, LC MS m/z=441 (MH+) Retention time=2.09 min.

Example 139

4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-2-(1,1-dimethyl-2-hydroxyethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (200 mg, 0.45 mmol) and 95%2-amino-2-methyl-1-propanol (94 mg, 1 mmol) were dissolved in THF (10ml) and stirred under Ar at 50° for 3 days. The solvents were removed invacuo, and the residue was partitioned between EtOAc and H₂O. Theorganic phase was washed with H₂O, satd aq NaCl, dried over anhydNa₂SO₄, filtered and evaporated to give the crude product. Flashchromatography eluted with 0-15% EtOAc/CH₂Cl₂ gave the title compound asa off-white amorphous solid. mp 99-105° C., LC MS m/z=455 (MH+)Retention time=2.19 min.

Example 140

2-Ethylamino-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) was combined and stirredwith 5 mL of a 2M solution of ethylamine in THF. After 5 min thesolvents were removed in vacuo, and the residue was partitioned betweenEtOAc and H₂O. The organic phase was washed with H₂O, satd aq NaCl,dried over anhyd Na₂SO₄, filtered and evaporated to give the crudeproduct. Flash chromatography eluted with 0-2% EtOAc/CH₂Cl₂ followed byrecrystallization from CH₂Cl₂/hexane gave the product as a light-yellowcrystalline solid. mp 176-177°, LC MS m/z=393 (MH+) Retention time=2.38min.

Example 141

(S)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-2-[(1-hydroxyprop-2-yl)amino]-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and (S)-2-amino-1-propanol(75 mg, 1 mmol) were dissolved in THF (10 ml) and stirred under Ar at23° C. for 18 h. The solvents were removed in vacuo, and the residue waspartitioned between EtOAc and H2O. The organic phase was washed withH₂O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered and evaporated togive the crude product. Flash chromatography eluted with 0-20%EtOAc/CH₂Cl₂ gave the title compound as an off-white amorphous solid. mp114-120°, LC MS m/z=423 (MH₊) Retention time=2.0 min.

Example 142

(R)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-2-[(1-hydroxyprop-2-yl)amino]-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and (R)-2-amino-1-propanol(75 mg, 1 mmol) were dissolved in THF (10 ml) and stirred under Ar at23° for 18 h. The solvents were removed in vacuo, and the residue waspartitioned between EtOAc and H₂O. The organic phase was washed withH₂O, satd aq NaCl, dried over anhyd Na₂SO₄, filtered and evaporated togive the crude product. Flash chromatography eluted with 0-20%EtOAc/CH₂Cl₂ gave the title compound as a off-white amorphous solid. mp116-122°, LC MS m/z=423 (MH+) Retention time=2.04 min.

Example 143

2-(1,1-dimethyl-2-hydroxyethylamino)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and2-amino-2-methyl-1-propanol (94 mg, 1 mmol) were dissolved in THF (10ml) and stirred under Ar at 50° for 3 days. The solvents were removed invacuo, and the residue was partitioned between EtOAc and H₂O. Theorganic phase was washed with H₂O, satd aq NaCl, dried over anhydNa₂SO₄, filtered and evaporated to give the crude product. Flashchromatography eluted with 0-15% EtOAc/CH₂Cl₂ gave the title compound asa light-yellow amorphous solid. mp 106-112°, LC MS m/z=437 (MH+)Retention time=1.94 min.

Example 144

2-Hydroxy-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

A much more polar product formed in Example 143 was eluted from theflash column on silica gel with 5% MeOH/CH₂Cl₂. This was recrystallizedfrom EtOAc to give the title compound as a white crystalline solid. Thiscompound was presumably formed by reaction of the starting materialsulfone with H₂O that contaminated the amine starting material.mp >280°, LC MS m/z=366 (MH+) Retention time=1.7 min

Example 145

2-Cyclohexylamino-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and cyclohexylamine (100mg, 1 mmol) were combined in THF (10 mL) and stirred under Ar at 23° for18 h. The solvents were removed in vacuo, and the residue was flashchromatographed on silica gel eluted with 50-100% CH₂Cl₂/hexane.Recrystallization from CH₂Cl₂/hexane gave the title compound as awhite-crystalline solid. mp 181-182°, LC MS m/z=447 (MH+) Retentiontime=2.71 min.

Example 146

2-(Tetrahydropyran-4-ylamino)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and4-aminotetra-hydropyran (102 mg, 1 mmol) were combined in THF (10 mL)and stirred under Ar at 23° for 18 h. The solvents were removed invacuo, and the residue was flash chromatographed with 0-15%EtOAc/CH₂Cl₂. Recrystallization from CH₂Cl₂/hexane gave the titlecompound as a light-yellow crystalline solid. mp 211-212°, LC MS m/z=449(MH+) Retention time=2.21 min

Example 147

2-Ethylamino-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (200 mg, 0.45 mmol) was combined and stirredwith 5 mL of a 2M solution of ethylamine in THF. After 5 min thesolvents were removed in vacuo, and the residue was partitioned betweenEtOAc and H₂O. The organic phase was washed with H₂O, satd aq NaCl,dried over anhyd Na₂SO₄, filtered and evaporated to give the crudeproduct. Flash chromatography with 0-2% EtOAc/CH₂Cl₂ followed byrecrystallization from CH₂Cl₂/hexane gave the product as awhite-crystalline solid. mp 195-196°, LC MS m/z=411 (MH+) Retentiontime=2.4 min.

Example 148

2-Cyclohexylamino-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (200 mg, 0.45 mmol) and cyclohexylamine (100mg, 1 mmol) were combined in THF (10 mL) and stirred under Ar at 23° for18 h. The solvents were removed in vacuo, and the residue was flashchromatographed with 50-100% CH₂Cl₂/hexane. Recrystallization fromCH₂Cl₂/hexane gave the title compound as a white-crystalline solid. mp218-219° C., LC MS m/z=465 (MH+) Retention time=2.8 min.

Example 149

2-(Tetrahydropyran-4-ylamino)-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (200 mg, 0.45 mmol) and4-aminotetra-hydropyran (102 mg, 1 mmol) were combined in THF (10 mL)and stirred under Ar at 23° for 18 h. The solvents were removed invacuo, and the residue was flash chromatographed with 0-15% EtOAc/CH₂Cl₂Recrystallization from CH₂Cl₂/hexane gave the title compound as alight-yellow crystalline solid. mp 231-232°, LC MS m/z=467 (MH+)Retention time=2.27 min.

Example 150

2-(2,2,2-Trifluoroethylamino)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and trifluoroethylamine(200 mg, 2 mmol) were dissolved in THF (7 ml) and sealed in a vial underAr. The mixture was heated in an oil bath to 60° for 4 days. Thesolvents were removed in vacuo, and the residue was flashchromatographed with 60-90% CH₂Cl₂/hexane. Recrystallization fromCH₂Cl₂/hexane gave the title compound as a white crystalline solid. mp187-188°, LC MS m/z=447(MH+) Retention time=2.27 min.

Example 151

trans-2-(4-Hydroxycyclohexylamino)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol), trans-4-aminocyclohexanolhydrochloride (151 mg, 1 mmol), and triethylamine (0.28 mL, 2 mmol) werecombined in THF (10 mL) and stirred under Ar at 50° for 2 days. Thesolvents were removed in vacuo, and the residue was partitioned betweenEtOAc and H₂O. The organic phase was washed with H2O, satd aq NaCl,dried over anhyd Na₂SO₄, filtered and evaporated to give the crudeproduct. Flash chromatography with 0-20% EtOAc/CH₂Cl₂ followed byrecrystallization from CH₂Cl₂/hexane gave the product as a pale yellowcrystalline solid. mp 148-151°, LC MS m/z=463 (MH+) Retention time=2.0min.

Example 152

2-(1-hydroxymethyl-1-methyl-2-hydroxyethylamino)-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) and2-amino-2-methyl-1,3-propanediol (105 mg, 1 mmol) were combined in THF(10 mL) and stirred under Ar at 50° for 3 days. The solvents wereremoved in vacuo, and the residue was flash chromatographed with 0-25%EtOAc/CH₂Cl₂ Recrystallization from CH₂Cl₂/hexane gave the titlecompound as a white-crystalline solid. mp 160-162°, LC MS m/z=453 (MH+)Retention time=1.75 min

Example 153

2-(2,2,2-Trifluoroethylamino)-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (300 mg, 0.67 mmol) and trifluoroethylamine(300 mg, 3 mmol) were dissolved in THE (10 ml) and sealed in a vialunder Ar. The mixture was heated in an oil bath to 60° for 4 days. Thesolvents were removed in vacuo, and the residue was flashchromatographed with 60-90% CH₂Cl₂/hexane. Recrystallization fromCH₂Cl₂/hexane gave the title compound as a white crystalline solid. mp195-196°, LC MS m/z=465(MH+) Retention time=2.38 min.

Example 154

2-(1-hydroxymethyl-1-methyl-2-hydroxyethylamino)-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (300 mg, 0.67 mmol) and2-amino-2-methyl-1,3-propanediol (158 mg, 1.5 mmol) were combined in THF(10 mL) and stirred under Ar at 50° for 3 days. The solvents wereremoved in vacuo, and the residue was flash chromatographed with 0-25%EtOAc/CH₂Cl₂. Recrystallization from CH₂Cl₂/hexane gave the titlecompound as a white-crystalline solid. mp 158-160°, LC MS m/z=471 (MH+)Retention time=1.75 min.

Example 155

trans-2-(4-Hydroxycyclohexylamino)-4-(4-fluoro-2-methylphenyl)-8-(2,6-difluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 48 (300 mg, 0.67 mmol), trans-4-aminocyclohexanolhydrochloride (226 mg, 1.5 mmol), and triethylamine (0.42 mL, 3 mmol)were combined in THF (15mL) and stirred under Ar at 50° for 2 days. Thesolvents were removed in vacuo, and the residue was partitioned betweenEtOAc and H₂O. The organic phase was washed with H₂O, satd aq NaCl,dried over anhyd Na₂SO₄, filtered and evaporated to give the crudeproduct. Flash chromatography with 0-20% EtOAc/CH₂Cl₂ followed byrecrystallization from CH₂Cl₂/hexane gave the product as awhite-crystalline solid. mp 158-160°, LC MS m/z=481 (MH+) Retentiontime=2.08 min.

Example 156

2-Ethoxy-4-(4-fluoro-2-methylphenyl)-8-(2-fluorophenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

The product of Example 59 (200 mg, 0.47 mmol) was placed in EtOH (10 mL)and the mixture stirred under Ar. Approximately 2 mL of the ethanol wasdistilled off to dry the mixture. When the mixture was cooled to 23°,some of the starting material sulfone crystallized out. NaH (11.5 mg,0.46 mmol) was added. The reaction did not go to completion, soadditional NaH (4 mg, 0.16 mmol) was added. The solvent was removed invacuo, and the residue was flash chromatographed on silica gel elutedwith 60-100% CH₂Cl₂/hexane. Recrystallization from CH₂Cl₂/hexane gavethe title compound as a white crystalline solid. mp 137-139°, LC MSm/z=394(MH+) Retention time=2.32 min.

Example 157

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[(2-aminoethyl)amino]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48[8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one](0.89 g, 0.002 mol) in dry THF, stirring at 23°, under Ar, was treatedwith ethylenediamine (668 uL, 0.01 mol). The color became orange. LC MSshowed no starting material after 5 min. Reaction was stripped todryness; the residue taken up in EtOAc-H2O. The layers were separatedand the aq phase adjusted to pH 10.5 with 10% NaOH. Aq phase wasextracted twice with EtOAc; combined organic layers were dried (Na₂SO₄),then evaporated to give 0.762 g (89%) of the title compound as a glass.LC MS (m/e)=426 (MH+). Rt=1.52 min.

Example 158

1-[2-[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]ethyl]-3-ethylurea

The product of Example 157 (42.5 mg., 0.0001 mol) stirring at 23° in dryTHF (5 mL), under Ar, was treated with ethyl isocyanate (9.6 mg, 0.0001mol) in one portion. After 30 min., the resulting red solution wasstripped to dryness; taken up in methylene chloride (5 mL) and appliedto a Chromatotron™ Rotor Plate (1000 u thickness); plate eluted withmethylene chloride-methanol gradient (0% to 2% MeOH), to afford 30 mg(60.4%) of pure title compound. (m.p. 130°-133°). LC MS (m/e)=497 (MH+).Rt=2.04 min.

Example 159

1-[2-[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]ethyl]-3-phenylurea

The title compound from Example 157 (42.3 mg, 0.0001 mol) was treatedwith phenylisocyanate (11.9 mg, 0.00011 mol) in the same manner asdescribed in Example 158. Purification afforded 43 mg (79%) of the titlecompound as a red solid (m.p. 142°-148°) LC MS (m/e)=545 (MH+). Rt=2.34min.

Example 160

1-[2-[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]ethyl]-3-cyclohexylurea

The title compound from Example 157 (42.3 mg, 0.0001 mol) was treatedwith cyclohexylisocyanate (12.5 mg, 0.00011 mol) in the same manner asdescribed in Example 158. Purification afforded 43 mg (78%) of the titlecompound as a red solid (m.p. 178°-183°) LC MS (m/e)=551 (MH+). Rt=2.38min.

Example 161

1-[2-[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]ethyl]-3-[3-fluorophenyl]urea

The title compound from Example 157 (42.3 mg, 0.0001 mol) was treatedwith 3-fluorophenylisocyanate (12 mg, 0.0001 mol) in the same manner asdescribed in Example 158. Purification afforded 38 mg (67.6%) of thetitle compound as a light yellow solid (m.p. 131°-144°) LC MS (m/e)=563(MH+). Rt=2.22 min.

Example 162

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[1-(2-aminoethyl)-3-methylureido]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 157 (150 mg, 0.00035 mol) was treatedwith methylisocyanate (22 uL, 21.6 mg, 0.00035 mol) in the same manneras described in Example 158. Purification afforded 100.5 mg (59%) of thetitle compound as a light red solid (m.p. 124°-133°) LC MS (m/e)=452(MH+). Rt=1.85 min.

Example 163

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-aminoethyl)-3-benzamido]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 157 (300 mg, 0.00071 mol) in dry THF (10mL) was treated with stirring, under Ar, with triethylamine (78.8 mg,109 uL, 0.00078 mol) followed by benzoyl chloride (119 mg, 99 uL,0.00085 mol). The mixture was stirred for 18 h at 23°; stripped todryness, then taken up in methylene chloride (5 mL) and applied to aChromatotron™ Rotor Plate (2000 u thickness); plate eluted withmethylene chloride-methanol gradient (0% to 2% MeOH). This afforded 141mg (37.5%) of the title compound as a off white solid. (m.p. 246°-248°)LC MS (m/e)=530 (MH+). Rt=2.25 min.

Example 164

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-aminoethyl)-carbamicacid ethyl ester)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 157 (300 mg, 0.00071 mol) was treated inthe same manner as described in Example 163 using ethyl chloroformate(91.8 mg, 81.2 uL, 0.00085 mol) as the chlorocarbonyl reagent.Purification of the crude product afforded 64 mg (18%) of the titlecompound as a light brown solid.) (m.p. 91°-109°) LC MS (m/e)=4.98(MH+). Rt=2.09 min.

Example 165

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-aminoethyl)-propanamido)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 157 (300 mg, 0.00071 mol) was treated inthe same manner as described in Example 163 using propanoic anhydride(110 mg, 110 uL, 0.00085 mol) as the acylating reagent. Purification ofthe crude product afforded 180 mg (53%) of the title compound as a offwhite solid. (m.p. 214°-16°) LC MS (m/e)=482 (MH+). Rt=1.95 min.

Example 166

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-aminoethyl)-2,2-dimethylpropanamido)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 157 (300 mg, 0.00071 mol) was treated inthe same manner as described in Example 163 using 2,2-dimethylpropanoylchloride (102 mg, 104 uL, 0.00085 mol) as the acylating reagent.Purification of the crude product afforded 149 mg (41%) of the titlecompound as a off white solid.) (m.p. 111°-133°) LC MS (m/e)=510 (MH+).Rt=2.14 min.

Example 167

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-aminoethyl)-carbamicacid tert-butyl ester)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 157 (300 mg, 0.00071 mol) was treated inthe same manner as described in Example 163 using di-tert-butyldicarbonate (185 mg, 0.00085 mol) as the reagent for carbamateformation; triethylamine was omitted from this reaction. Purification ofthe crude product afforded 210 mg (56%) of the title compound as a offwhite solid. (m.p.106°-119°) LC MS (m/e)=526 (MH+). Rt=2.30 min.

Example 168

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-(N-aminouracil-5-yl)-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48[8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one](100 mg, 0.000225 mol) and 5-aminouracil (70 mg, 0.00055 mol) were takenup in dry DMSO (1.5 mL) and, with stirring under Ar, warmed to 65° for6.5 h. Reaction was cooled to 23°, then diluted with EtOAc; solution waswashed with H₂O; the aq phase was extracted with EtOAc; combined organiclayers were dried (Na₂SO₄) then evaporated to an amber glass. This glasswas crystallized from a small amount of MeOH, which crystals when driedafforded 15 mg (14%) of the title compound as a light yellow crystallinesolid. (m.p. >300°) LC MS (m/e)=493(MH+). Rt=1.82 min.

Example 169

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-N-(2-aminoethyl)-N′-(t-Butoxycarbonylglycyl-)-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 157 (168 mg, 0.0004 mol) in dry THF (2 mL)with tert-butoxycarbonylglycine (70 mg, 0.0004 mol) was treated withdicyclohexylcarbodiimide (82.4 mg, 0.0004 mol) in dry THF (2 mL). Thesolution was stirred 16h at 23°; filtered and stripped to dryness. Theresidue was taken up in methylene chloride (5 mL) and applied to aChromatotron™ Rotor Plate (1000 u thickness); plate eluted withmethylene chloride-methanol gradient (0% to 3% MeOH). This afforded 122mg (52%) of the title compound as a light red solid. LC MS(m/e)=583(MH+). Rt=2.12 min.

Example 170

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-aminoethyl)-N′-glycyl]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 169 (80 mg, 0.000137 mol) was taken up inmethylene chloride (2 mL); TFA (2 mL) was added and the solution stirredfor 0.5 hrs at 23° giving a pale amber solution. This was evaporated toan amber residue which was triturated with ethyl ether to give a solid.Solid was collected and dried in vacuo to afford the title compound asthe ditrifluoroacetic acid salt, an off white solid 60 mg (62%). LC MS(mle)=483(MH+). Rt=1.55 min.

Example 171

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-([2,2-dimethyl-2-hydroxy]ethylamino)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48 (150 mg, 0.000337 mol) in dry THF (5mL) was treated with 2,2-dimethylethanolamine (50 mg., 50 uL, 0.00067mol) [Prepared by the method of Bijaya L. Rai et al., J. Med. Chem.1998, 41, 3347]. stirred at 23°; reaction progress monitored by LC MS.Reaction was stripped to dryness; the residue was taken up in methylenechloride (5 mL) and applied to a Chromatotron™ Rotor Plate (2000 uthickness); plate eluted with methylene chloride-methanol gradient (0%to 1.5% MeOH). This afforded 116 mg (69%) of pure title compound as anoff white solid. LC MS (m/e)=455 (MH+). Rt=1.99 min.

Example 172

S-(+)-8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(1-Amino-2-propanol)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48 (150 mg, 0.000337 mol) in dry THF (5mL) was treated with S-(+)-1-amino-2-propanol (76 mg., 79 uL, 0.00098mol) and stirred at 23°; reaction progress monitored by LC MS. Reactionwas stripped to dryness; the residue was taken up in methylene chloride(5 mL) and applied to a Chromatotron™ Rotor Plate (2000 u thickness);plate eluted with methylene chloride-methanol gradient (0% to 1.5%MeOH). This afforded 76 mg (51%) of pure title compound as an off whitesolid. LC MS (m/e)=441 (MH+). Rt=1.94 min.

Example 173

R-(−)-8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(1-Amino-2-propanol)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48 (150 mg, 0.000337 mol) in dry THF (5mL) was treated with R-(−)-1-amino-2-propanol (50.5 mg., 54 uL, 0.00067mol) and stirred at 23°; reaction progress monitored by LC MS. Reactionwas stripped to dryness; the residue was taken up in methylene chloride(5 mL) and applied to a Chromatotron™ Rotor Plate (2000 u thickness);plate eluted with methylene chloride-methanol gradient (0% to 1.5%MeOH). This afforded 89 mg (60%) of pure title compound as an off whitesolid. LC MS (m/e)=441 (MH+). Rt=1.94 min.

Example 174

(R)-8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(1-amino-2-hydroxy-2-phenylethyl)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48 (150 mg, 0.000337 mol) in dry THF (5mL) was treated with R-2-Amino-1-phenylethanol (93 mg., 0.00067 mol) andstirred at 23°; reaction progress monitored by LC MS. Reaction wasstripped to dryness; the residue was taken up in methylene chloride (5mL) and applied to a Chromatotron™ Rotor Plate (2000 u thickness); plateeluted with methylene chloride-methanol gradient (0% to 1.5% MeOH). Thisafforded 108 mg (64%) of pure title compound as a light orange gum. LCMS (m/e)=503 (MH+). Rt=2.20 min.

Example 175

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-trihydroxy-methylaminomethyl]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 48 (150 mg, 0.000337 mol) and TRIS(trihydroxymethylaminomethane) (121 mg, 0.0001 mol) inN-methylpyrrolidinone (1.5 mL) was microwaved at 180° for 2 min (with a3 min ramp up) at 300 watts with a MARS 5™ Microwave (CEM Corporation).No starting material remained as monitored by LC MS. The solvent wasstripped off at pump vacuum and the residue was taken up in methylenechloride (5 mL) and applied to a Chromatotron™ Rotor Plate (2000 uthickness); plate eluted with methylene chloride-methanol gradient (0%to 1.5% MeOH). This afforded 42 mg (26%) of pure title compound as alight brown solid. LC MS (m/e)=487 (MH+). Rt=1.55 min.

Example 176

8-(2-Fluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-([2,2-dimethyl-2-hydroxy]ethylamino)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 59 (144 mg, 0.000337 mol) in dry THF (5mL) was treated with 2,2-dimethylethanolamine (50 mg., 50 uL, 0.00067mol) [Prepared by the method of Bijaya L. Rai et al., J. Med. Chem.1998, 41, 3347] and stirred at 23°; reaction progress monitored by LCMS. Reaction was stripped to dryness; the residue was taken up inmethylene chloride (5 mL) and applied to a Chromatotron™ Rotor Plate(2000 u thickness); plate eluted with methylene chloride-methanolgradient (0% to 1.5% MeOH). This afforded 106 mg (72%) of pure titlecompound as an off white solid. LC MS (m/e)=437 (MH+). Rt=1.92 min

Example 177

(S)-(+)-8-(2-Fluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-([2-methyl-2-hydroxy]ethylamino)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 59 (144 mg, 0.000337 mol) in dry THF (5mL) was treated with S-(+)-1-amino-2-propanol (76 mg., 79 uL, 0.00098mol) and stirred at 23°; reaction progress monitored by LC MS. Reactionwas stripped to dryness; the residue was taken up in methylene chloride(5 mL) and applied to a Chromatotron™ Rotor Plate (2000 u thickness);plate eluted with methylene chloride-methanol gradient (0% to 1.5%MeOH). This afforded 132 mg (93%) of pure title compound as a paleyellow solid. LC MS (m/e)=423 (MH+). Rt=1.82 min

Example 178

(R)-(−)-8-(2-Fluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-([2-methyl-2-hydroxy]ethylamino)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 59 (150 mg, 0.000337 mol) in dry THF (5mL) was treated with R-(−)-1-amino-2-propanol (50.5 mg., 54 uL, 0.00067mol) and stirred at 23°; reaction progress monitored by LC MS. Reactionwas stripped to dryness; the residue was taken up in methylene chloride(5 mL) and applied to a Chromatotron™ Rotor Plate (2000 u thickness);plate eluted with methylene chloride-methanol gradient (0% to 1.5%MeOH). This afforded 151 mg (Quant.) of pure title compound as a paleyellow gum. LC MS (m/e)=423 (MH+). Rt=1.84 min.

Example 179

4-Chloro-2-methylsulfanyl-6-cyclohexylaminopyrimidine-5-carboxaldehyde

4,6-Dichloro-2-methylsulfanylpyrimidine-5-carboxaldehyde (4.0 g, 0.018mol) in acetonitrile (65 mL) was treated with rapid stirring withcyclohexylamine (3.76 g, 4.3 mL, 0.038 mol) over 1 min. Reaction stirred16 h then diluted with 3 volumes of H₂O. The precipitated solid wascollected, washed with H₂O and dried in vacuo to afford 5.1 g. (99%) ofthe title compound as a white solid. LC MS (m/e)=286 (MH+). Rt=2.85 min.

Example 180

2-Methylsulfanyl-4-(2-methyl-4-fluorophenyl)-6-cyclohexylaminopyrimidine-5-carbaldehyde

A mixture of the title compound from Example 180 (5.1 g., 0.018 mol),2-methyl-4-fluoroboronic acid (5.54 g., 0.036 mol), Na₂CO₃ (3.82 g,0.036 mol), tetrakis(triphenylphosphine)palladium (0), dioxane (100 mL)and H₂O (50 mL), stirring under Ar, was warmed to 65° and stirred 16 h.Reaction was cooled to 23°; diluted with EtOAc, and the mixture washedin turn with H₂O, aq NaHCO₃, and satd aq NaCl. Organic phase was dried(Na₂SO₄), then stripped to a viscous syrup. The syrup was crystallizedfrom a small amount of MeOH with sonication and gentle warming. Thisafforded 5.5 g (86%) of the title compound as a white solid. LC MS(m/e)=360 (MH+). Rt=3.00 min.

Example 181

8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-methylthio-8H-pyrido[2,3-]pyrimidin-7-one

Triethylphosphonoacetate (3.87 mL, 0.01953 mol) in dry THF (56 mL) wastreated with NaH (60% in mineral oil) (967.5 mg, 0.0243 mol). Themixture was stirred for 30 min giving a clear solution. The titlecompound from Example 180 (4.5 g, 0.0125 mol) in dry THF (75 mL) wasadded in one portion and the solution gently refluxed for 72 h. Aftercooling to 23°, the reaction mixture was diluted with ethyl ether, thenwashed in turn with satd aq NH₄Cl and H₂O. Organic layer was dried(Na₂SO₄), then evaporated to a viscous syrup which was flashchromatographed in methylene chloride-hexane gradient (20% to 0% hexane)to afford first 920 mg (19%) of the title compound as a white solid. LCMS (m/e)=384 (MH+). Rt=2.79 min.

Example 182

8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-ethoxy-8H-pyrido[2,3-d]pyrmidin-7-one

The column of Example 181 was eluted with additional methylenechloride/hexane to afford 580 mg (12.2%) of the title compound of thepresent example as a white solid. LC MS (m/e)=382 (MH+). Rt=2.67 min

Example 183

8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-methanesulfonyl-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 181 (850 mg, 0.0022 mol) stirring inmethylene chloride (100 mL) was treated with m-chloroperbenzoic acid(77%) (992 mg, 0.0044 mol). Solution stirred overnight at 23°. LC MSshowed about 90% conversion to the title compound, therefore, anadditional 120 mg of m-chloroperbenzoic acid was added to the reaction.After 1 h, the reaction was washed in turn with 5% Na₂CO₃, then satd aqNaCl, dried (Na₂SO₄). Methyl sulfide (0.5 mL) was added to quench anyexcess peroxides. Solution was stripped to give 0.96 g, (quant.) of thetitle compound as a white solid. LC MS (m/e)=416 (MH+). Rt=2.24 min

Example 184

8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-[N-2,2-dimethylethanolamino]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 183 (150 mg, 0.00036 mol) in dry THF (2.5mL) was treated with 2,2-dimethylethanolamine (64 mg., 64 uL, 0.00072mol). [Prepared by the method of Bijaya L. Rai et al., J. Med. Chem.1998, 41, 3347] and stirred at 23°, 16 h; reaction progress monitored byLC MS. Reaction was stripped to dryness; the residue was taken up inmethylene chloride (5 mL) and applied to a Chromatotron™ Rotor Plate(2000 u thickness); plate eluted with methylene chloride-methanolgradient (0% to 2% MeOH to afford 107 mg (70%) of pure title compound asa colorless glass. LC MS (m/e)=425 (MH+). Rt=2.22 min

Example 185

(S)-(+)-8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-[N-1-amino-2-hydroxypropanyl]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 183 (150 mg, 0.00036 mol) in dry THF (2.5mL) was treated with S-(+)-1-amino-2-propanol (76 mg., 79 uL, 0.00098mol) and stirred at room temperature; reaction progress monitored by LCMS. Reaction warmed 15 h at 90° Reaction was stripped to dryness; theresidue was taken up in methylene chloride (5 mL) and applied to aChromatotron™ Rotor Plate (2000 u thickness); plate eluted withmethylene chloride-methanol gradient (0% to 2% MeOH). This afforded 118mg (80%) of pure title compound as a colorless gum. LC MS (m/e)=411(MH+). Rt=2.10 min.

Example 186

(R)-(−)-8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-[N-1-amino-2-hydroxypropanyl]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 183 (150 mg, 0.00036 mol) in dry THF (2.5mL) was treated with R-(−)-1-amino-2-propanol (54 mg., 58 uL, 0.00072mol) and stirred at 23° 16 h; reaction progress monitored by LC MS.Reaction was stripped to dryness; the residue was taken up in methylenechloride (5 mL) and applied to a Chromatotron™ Rotor Plate (2000 uthickness); plate eluted with methylene chloride-methanol gradient (0%to 2% MeOH) to afford 158 mg (Quant.) of pure title compound as acolorless gum. LC MS (m/e)=411 (MH+). Rt=2.12 min

Example 187

8-Cyclohexyl-4-(4-fluoro-2-methylphenyl)-2-[N-dihydroxymethylmethylamino]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound of Example 183 (150 mg, 0.00036 mol) in dry THF (2.5mL) was treated with serinol (62 mg., 0.000674 mol) and warmed at 90° 16h; reaction progress monitored by LC MS. Reaction was stripped todryness; the residue was taken up in methylene chloride (5 mL) andapplied to a Chromatotron™ Rotor Plate (2000 u thickness); plate elutedwith methylene chloride-methanol gradient (0% to 2% MeOH). This afforded163 mg (Quant.) of pure title compound as a colorless gum. LC MS(m/e)=427 (MH+). Rt=1.75 min

Example 188

8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-2-[N-(2-chloroethylamino)]-8H-pyrido[2,3-d]pyrimidin-7-one

The title compound from Example 48 (890 mg, 0.002 mol) in dry DMF (18mL) was treated with stirring 2-chloroethylamine (345 mg, 0.003 mol) andK₂CO₃ (207 mg, 0.0015 mol). The mixture was stirred 16 h at 23°. Thereaction was stripped to a residue; taken up in EtOAc; washed with H₂O(2×); organic extract dried (Na₂SO₄), then evaporated to a brown gum.This residue was taken up in methylene chloride (5 mL) and applied to aChromatotron™ Rotor Plate (2000 u thickness); plate eluted withmethylene chloride. This afforded 510 mg of the title compound withimproved purity. This compound was then taken up in acetonitrile (2 mL)and sonicated to give a white crystalline solid. Solid was collected anddried to give 280 mg (31.5%) of pure title compound. LC MS (m/e)=445(MH+). Rt=2.44 min.

Example 189

N-[2-[[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]amino]ethyl]methanesulfonamide

A solution of the product of Example 157 (250 mg, 0.58 mmol),di-isopropylethylamine (111 uL, 0.64 mmol) and CH₂Cl₂ (10 mL) was cooledto −5° and methanesulfonyl chloride (50 uL, 0.64 mmol) was added and theresulting soln was warmed to 23°, stirred 15 min, diluted with CH₂Cl₂(75 mL) and washed with 10% aq NaOH (2×20 mL) and satd aq NaCl, dried(Na₂SO₄), and concentrated to afford a brown solid. Chromatotronchromatography (CH₂Cl₂/CH₃OH) and crystallization from Et₂O afforded apink solid. mp=105-115° (dec); LC MS (m/e)=504.2 (MH+). Rt=1.94 min

Example 190

MethylN-[8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]glycinate

The product of Example 48 (2.25 g mg, 5.0 mmol), methyl glycinatehydrochloride (3.13 g, 25.0 mmol), anhyd K₂CO₃ (3.45 g, 25.0 mmol) andNMP (25 mL) were stirred for 1 h at 60°. The reaction was diluted withEtOAc (200 mL), washed with 10% aq citric acid (2×25 mL), H₂O (25 mL)and satd aq NaCl (40 mL) dried (Na₂SO₄) and concentrated. The resultingbrown residue was filtered through a plug of silica (350 mL)(dichloromethane/methanol) to afford a brown foam. Trituration with Et₂Oafforded the title compound, methylN-[8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]glycinateas a white solid. mp=212-213°.

Example 191

N-[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]glycine

The product of reaction 190 was reacted by the procedure of Example 84to afford the title compoundN-[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]glycineas a white solid. mp=260-261.

Example 192

2-[[8-(2,6-Difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]amino]-N-ethylacetamide

The product of Example 191 (50 mg, 0.11 mmol), n-hydroxybenzotriazole(21 mg, 0.34 mmol), 1-methylmorpholine (19 uL, 0.172 mmol),N-methylpyrrolidinone (2.5 mmol) were dissolved together, then1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (66 mg, 0.34mmol) was added, stirred 1 h, and then ethylamine (2 M in THF) (1.0 mL,2.0 mmol) was added and the reaction was stirred at 23° for 16 h,diluted with EtOAc (50 mL), and washed with 10% aq citric acid (2×20mL), H₂O (20 mL), and satd aq NaCl (20 mL), dried (MgSO₄) concentratedand purified by chromatotron chromatography (CH₂Cl₂/CH₃OH) to afford 35mg of the title compound2-[[8-(2,6-difluorophenyl)-4-(4-fluoro-2-methylphenyl)-7,8-dihydro-7-oxopyrido[2,3-d]pyrimidin-2-yl]amino]-N-ethylacetamideas a white powder. mp=250-253 (dee). LC MS (m/e)=468.2 (MH+). Rt=1.87min.

Example 193

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-morpholin-4-yl-2-oxo-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Under Ar, a soln of morpholine (58 mg, 0.66 mmol) and trimethylaluminum(2M in toluene) (0.33 mL, 0.66 mmol) in dichloromethane was stirred for10 min. A soln of the product of Example 190 (100 mg, 0.22 mmol) indichloromethane (2 mL) was added. The resulting mixture was stirred for16 h, diluted with EtOAc and washed with H₂O to give the crude material.Purification by Flash chromatography on silica gel, eluting withEtOAc/hexane/triethylamine (70/30/2, v/v/v), followed byrecrystallization from dichloromethane and hexane, gave the desiredproduct (35 mg, 31%). LC-MS: 510.10 (MH+, m/z), 1.96 (Rt, min).

Example 194

4-(4-Fluoro-2-methyl-phenyl)-2-((R)-2-hydroxy-1-methyl-ethylamino)-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (200 mg, 0.47 mmol) and (R)-(−)-2-amino-1-propanol (0.18 mL,2.36 mmol) afforded the title compound as a white solid. 170 mg (86%).LC-MS: 419.2 (MH+, m/z), 2.00 (Rt, min).

Example 195

4-(4-Fluoro-2-methyl-phenyl)-2-(4-hydroxyl-cylclohexylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

trans-4-Aminocyclohexanol hydrochloride (270 mg, 2.35 mmol), NMP (1 mL)and triethylamine (0.33 mL, 2.35 mmol) were stirred at 23° for 10 min.The product of Example 121 (200 mg, 0.47 mmol) was added and the mixturewas stirred 2 h, diluted with EtOAc and washed with H₂O. Separation ofthe organic phase and evaporation of solvent afforded the crudematerial, which was purified as described in Example 126 to give thedesired product 98 mg (46%). LC-MS: 459.4 (MH+, m/z), 2.12 (Rt, min).

Example 196

4-(4-Fluoro-2-methyl-phenyl)-2-((S)-2-hydroxy-1-methyl-ethylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (200 mg, 0.47 mmol) and (S)-(+)-2-amino-1-propanol (0.18 mL,2.36 mmol) afforded the desired product 185 mg (94%). LC-MS: 419.2 (MH+,m/z), 1.96 (Rt, min)

Example 197

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-1,1-dimethyl-ethylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (222 mg, 0.52 mmol) and 2-amino-2-methyl-1-propanol (0.25mL, 2.62 mmol) were reacted to give the crude material. Purification byFlash chromatography eluting with dichloromethane/ethanol/triethylamine(100/1/2, v/v/v), followed by preparative HPLC, eluting withacetonitrile/H₂O (10/90, v/v to 90/10, v/v, over 10 min), gave thedesired product 25 mg (11%). LC-MS: 433.4 (MH+, m/z), 2.10 (Rt, min).

Example 198

2-Ethylamino-4-(4-fluoro-2-methyl-phenyl)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (200 mg, 0.47 mmol), and ethylamine (1.18 mL, 2.36 mmol)were reacted to give the crude material. Purification by flashchromatography eluting with EtOAc/hexane/triethylamine (30/70/2, v/v/v),followed by recrystallization from dichloromethane and hexane, gave thedesired product 150 mg (82%). LC-MS: 389.2 (MH+, m/z), 2.39 (Rt, min).

Example 199

2-Cyclohexylamino-4-(4-fluoro-2-methyl-phenyl)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (200 mg, 0.47 mmol), and cyclohexylamine (0.27 mL, 2.36mmol) were reacted to give the crude material, which was purified asdescribed in Example 198 to give the desired product 100 mg (48%).LC-MS: 443.4 (MH+, m/z), 2.79 (Rt, min).

Example 200

4-(4-Fluoro-2-methyl-phenyl)-2(tetrahydro-pyran-4-ylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (150 mg, 0.35 mmol), and 4-aminotetrahydropyran (179 mg,1.77 mmol) were reacted to give the crude material, which was purifiedas described in Example 198 to give the desired product 140 mg (90%).LC-MS: 445.4 (MH+, m/z), 2.27 (Rt, min).

Example 201

4-(4-Fluoro-2-methyl-phenyl)-8-o-tolyl-2-(2,2,2-trifluoro-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 121 (150 mg, 0.35 mmol), 2,2,2-trifluoro-ethylamine (176 mg,1.77 mmol) were reacted to give the crude material, which was purifiedas described in Example 198 to give the desired product 130 mg (84%).LC-MS: 443.0 (MH+, m/z), 2.27 (Rt, min).

Example 202

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-1-hydroxymethyl-1-methyl-ethylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 60, the product ofExample 121 (200 mg, 0.47 mmol) and 2-amino-2-methyl-1,3-propanediol(494 mg, 4.7 mmol) were reacted to give the crude material, which waspurified as described in Example 126 to give the desired product 130 mg(62%). LC-MS: 449.0 (MH+, m/z), 1.67 (Rt, min)

Example 203

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidine-2-ylamino]-N,N-dimethyl-acetamide

Following the general procedure outlined in Example 193, dimethylamine(1.1 mL, 2.2 mmol), trimethylaluminum (1.1 mL, 2.2 mmol) and the productof Example 190 (100 mg, 0.22 mmol) were reacted to give the desiredproduct 56 mg (54%). LC-MS: 468.2 (MH+, m/z), 2.00 (Rt, min).

Example 204

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-oxo-2-pyrrolidin-1-yl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 193, pyrrolidine(0.18 mL, 2.2 mmol), trimethylaluminum (1.1 mL, 2.2 mmol) and theproduct of Example 190 (100 mg, 0.22 mmol) were reacted to give thedesired product 52 mg (48%). LC-MS: 494.4 (MH+, m/z), 2.10 (Rt, min)

Example 205

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-N-(2-methoxy-ethyl)-acetamide

Following the general procedure outlined in Example 193,2-methoxy-ethylamine (0.17 mL, 2.2 mmol), trimethylaluminum (1.1 mL, 2.2mmol) and the product of Example 190 (200 mg, 0.44 mmol) were reacted togive the desired product 145 mg (66%). LC-MS: 498.2 (MH+, m/z), 1.90(Rt, min).

Example 206

3-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-propionitrile

Following the general procedure outlined in Example 126, the product ofExample 48 (500 mg, 1.12 mmol) and 3-aminopropionitrile (0.41 mL, 5.6mmol) were reacted to give the desired product 270 mg (55%). LC-MS:436.0 (MH+, m/z), 2.17 (Rt, min).

Example 207

4-(4-Fluoro-2-methyl-phenyl)-2-morpholin-4-yl-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 193, the product ofExample 121 (100 mg, 0.22 mmol), morpholine (58 mg, 0.66 mmol) andtrimethylaluminum (0.33 mL, 0.66 mmol) were reacted to give the desiredproduct, 61 mg (64%). LC-MS: 431.2 (MH+, m/z), 2.46 (Rt, min).

Example 208

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1SR,2SR)-2-hydroxy-cyclohexylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 195, the product ofExample 48 (200 mg, 0.45 mmol), trans-2-hydroxy-1-cyclohexylaminehydrochloride (341 mg, 2.25 mmol) and triethylamine (0.31 mL, 2.25 mmol)were reacted to give the crude material, which was purified as describedin Example 193 to give the desired product 100 mg (46%). LC-MS: 481.2(MH+, m/z), 2.25 (Rt, min).

Example 209

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-N-(2-hydroxy-ethyl)-acetamide

To a soln of the product of Example 205 (50 mg, 0.1 mmol), indichloromethane (2 mL) was added 1 M boron tribromide in dichloromethane(0.5 mL, 0.5 mmol). The mixture was stirred at 23° for 2 h, H₂O wasadded, extracted with EtOAc. The organic layer was dried (Na₂SO₄) andconcentrated to give the crude material. Recrystallization fromdichloromethane and hexane afforded the title product (30 mg, 62%).LC-MS: 484.2 (MH+, m/z), 1.59 (Rt, min).

Example 210

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[2-(1H-tetrazol-5-yl)-ethylamino]-8H-pyrido[2,3-d]pyrimidin-7-one

A suspension of the product of Example 206 (200 mg, 0.46 mmol),triethylamine hydrochloride (630 mg, 4.6 mmol) and NaN₃ (299 mg, 4.6mmol) in toluene (20 mL) was heated to toluene reflux for 60 h.Preparative HPLC afforded the title compound 100 mg (45%). LC-MS: 479.0(WM+, m/z), 1.82 (Rt, min).

Example 211

N-Cyclopropyl-2-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-acetamide

Following the procedure outlined in Example 193, cyclopropylamine (0.23mL, 3.3 mmol), trimethylaluminum (1.7 mL, 3.3 mmol) and the product ofExample 190 (150 mg, 0.33 mmol) were reacted to give the desiredproduct, 20 mg (13%). LC-MS: 480.0 (MH+, m/z), 1.89 (Rt, min).

Example 212

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-((1H-tetrazol-5-ylmethyl)amino)-8H-pyrido[2,3-d]pyrimidin-7-onea)[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-acetonitrile

Following the general procedure outlined in Example 195, the product ofExample 48 (500 mg, 1.12 mmol), aminoacetonitrile hydrogen sulfate (1.16g, 5.6 mmol) and triethylamine (0.78 mL, 5.6 mmol) were reacted at 65°for 2 h to give the crude material 460 mg. LC-MS: 421.8 (MH+, m/z), 2.08(Rt, min).

b)2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-((1H-tetrazol-5-ylmethyl)amino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the procedure outlined in Example 210, the crude product ofExample 212(a),[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-acetonitrile(460 mg), triethylaminehydrochloride (1.54 g, 11.2 mmol) and NaN₃ (728mg, 11.2 mmol) were reacted to give the desired product 50 mg (9.6%).LC-MS: 465.2 (MH+, m/z), 1.79 (Rt, min).

Example 213

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1SR,2SR)-2-hydroxy-cyclopentylamino)-8H-pyrido[2,3-d]pyrimidin-7-onea) trans-2-azido-cyclopentanol

To a soln of cyclopenteneoxide (2.0 g, 23.8 mmol) in CH₃OH and H₂O (40mL) (4/1, v/v), were added NaN₃ (7.73 g, 119 mmol) and NH₄Cl (3.17 g,59.2 mmol). The resulting mixture was heated to solvent reflux for 18 hthen cooled to 23°. The mixture was concentrated and the residue wasdiluted with EtOAc, washed with H₂O, the organic layer was dried overNa₂SO₄, concentrated to give the desired product (2.8 g, 93%). ¹H NMR(CDCl₃): δ 4.10 (m, 1H), 3.72 (m, 1H), 2.10 (m, 2H), 1.72-1.60 (m, 4H).

b) trans-2-amino-cyclopentanol hydrochloride

To a solution of trans-2-azido-cyclopentanol (1.0 g, 7.87 mmol) inEtOAc, was added 10% Pd/C (0.5 g). The mixture was flushed with Ar, andthen stirred on Parr apparatus at 40 psi for 2 h at 23°. The mixture wasfiltered through celite and the celite was washed with EtOAc. Thefiltrate was acidified with 3 mL of 4N HCl in 1,4-dioxane, and a whitesolid was precipitated. The mixture was filtered and the solid wascollected to give the desired product (0.76 g, 99%). ¹H NMR (MeOD-d₄): δ4.09-4.04 (m, 1H), 3.29-3.25 (m, 1H), 2.18 (m, 1H), 2.03 (m, 1H),1.83-1.80 (m, 2H), 1.65-1.58 (m, 2H).

c)2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1SR,2SR)-2-hydroxy-cyclopentylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 195, the product ofExample 48 (200 mg, 0.45 mmol), trans-2-amino-cyclopentanolhydrochloride (227 mg, 2.25 mmol) and triethylamine (0.31 mL, 2.25 mmol)were reacted for 2 h to give the desired product 63 mg (30%). LC-MS:467.0 (MH+, m/z), 2.09 (Rt, min).

Example 214

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(3-methylsulfanyl-propylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 48 (200 mg, 0.44 mmol) and 3-(methylthio)propylamine (231 mg,2.2 mmol) were reacted to afford the title compound 108 mg (52%). LC-MS:471.2 (MH+, m/z), 2.37 (Rt, min).

Example 215

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(3-methanesulfonyl-propylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

To a soln of the product of Example 214 (120 mg, 0.26 mmol) indichloromethane (5 mL), was added m-chloroperbenzoic acid (130 mg, 0.52mmol). The mixture was stirred for 1.5 h at 23°. The mixture was dilutedwith EtOAc and washed with H₂O to give the crude material. Purificationby column chromatography eluting with EtOAc/triethylamine (100/2, v/v),followed by recrystallization from dichloromethane and hexane, gave thedesired product (80 mg, 61%). LC-MS: 503.2 (MH+, m/z), 1.94 (Rt, min).

Example 216

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-oxo-2-(3-oxo-piperazin-1-yl)-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 193,piperazine-2-one (165 mg, 1.65 mmol), trimethylaluminum (0.83 mL, 1.65mmol) and the product of Example 190 (150 mg, 0.33 mmol) were reacted togive the crude material. Preparative HPLC, eluting with acetonitrile/H₂O(10/90, v/v to 90/10, v/v, over 10 min), followed by recrystallizationfrom dichloromethane and hexane, gave the desired product 50 mg (29%).LC-MS: 523.2 (MH+, m/z), 1.68 (Rt, min).

Example 217

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[(5-methyl-4H-[1,2,4]triazol-3-ylmethyl)-amino]-8H-pyrido[2,3-d]pyrimidin-7-one

A solution of the product of Example 48 (150 mg, 0.34 mmol) and(5-methyl-4H-[1,2,4]triazol-3-yl)-methylamine (190 mg, 1.7 mmol) in NMP(2 mL) was stirred at 100° for 16 h to give the crude material.Preparative HPLC, eluting with acetonitrile/H₂O (10/90, v/v to 90/10,v/v, over 10 min), gave the desired product 23 mg (14%). LC-MS: 478.2(MH+, m/z), 1.70 (Rt, min).

Alternatively, the desired product can be purified by flashchromatography eluting with EtOAc/triethylamine (100/2, v/v), followedby recrystallization as hydrochloride salt from EtOAc and methanol.

Example 218

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-((1,1-dioxo-tetrahydro-1-thiophen-3-ylmethyl)-amino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (100 mg, 0.22 mmol) and 3-aminomethylsulfolane (328 mg, 2.2mmol) were reacted to give the crude material. Purification by Flashchromatography eluting with EtOAc/hexane/triethylamine (65/35/2, v/v/v),gave the desired product 25 mg (22%). LC-MS: 515.4 (MH+, m/z), 1.97 (Rt,min).

Example 219

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-((3-methyl-isoxazol-5-ylmethyl)amino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (100 mg, 0.22 mmol) and (3-methyl-isoxazol-5-yl)-methylamine(125 mg, 1.12 mmol) were reacted to give the desired product 50 mg(44%). LC-MS: 478.2 (MH+, m/z), 2.20 (Rt, min).

Example 220

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-((3S,4S)-4-hydroxy-1,1-dioxo-tetrahydro-1-amino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (100 mg, 0.22 mmol) and 3(S)-amino-4(S)-hydroxysulfolane (169mg, 1.12 mmol) were reacted to give the desired product 50 mg (44%).LC-MS: 517.0 (MH+, m/z), 1.87 (Rt, min).

Example 221

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-oxo-2,3-dyhydro-pyrimidin-4-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (100 mg, 0.22 mmol) and cytosine (124 mg, 1.12 mmol) werereacted to give the crude material. Preparative HPLC afforded the titlecompound, 27 mg (20%). LC-MS: 477.2 (MH+, m/z), 1.77 (Rt, min).

Example 222

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-((1H-imidazol-2-ylmethyl)amino)-8H-pyrido[2,3-d]pyrimidin-7-one

(1H-Imidazol-2-yl)-methylamine dihydrochloride (184 mg, 1.1 mmol), NMP(1 mL), and triethylamine (0.31 mL, 2.2 mmol) were stirred at 23° 10min. The product of Example 48 (100 mg, 0.22 mmol) was added and themixture was reacted at 100° for 16 h to give the crude material.Preparative hplc afforded the title compound, 36 mg (29%). LC-MS: 463.2(MH+, m/z), 1.42 (Rt, min).

Example 223

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1H-[1,2,4]triazol-3-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (150 mg, 0.33 mmol) and 3-amino-1,2,4-triazole (141 mg, 1.68mmol) were reacted to give the crude material. Preparative hplc affordedthe title compound 28 mg (15%). LC-MS: 450.2 (MR+, m/z), 1.79 (Rt, min).

Example 224

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(1H-tetrazol-5-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (150 mg, 0.33 mmol) and 5-amino-1H-tetrazole (143 mg, 1.68mmol) were reacted to give the crude material, which was purifiedpreparative hplc to afford the title compound, 17 mg (9%). LC-MS: 451.0(MH+, m/z), 2.04 (Rt, min).

Example 225

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-methoxy-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

A solution of the product of Example 48 (150 mg, 0.34 mmol) and2-methoxy-ethylamine (0.09 mL, 1.01 mmol) in DMF (2 mL) was stirred 23°for 16 h. The mixture was diluted with EtOAc and washed with H₂O to givethe crude material, which was purified as described in Example 198 togive the desired product 70 mg (47%). LC-MS: 441.2 (MH+, m/z), 2.10 (Rt,min)

Example 226

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(tetrahydro-furan-3-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-onea) (Tetrahydro-furan-3-yl)-carbamic acid tert-butyl ester

Under Ar, to a soln of (+/−)-tetrahydro-3-furoic acid (500 mg, 4.30mmol) in DMF (2 mL) was added triethylamine(0.66 mL, 4.74 mmol),followed by diphenylphosphoryl azide (1.02 mL, 4.74 mmol). The mixturewas heated to 80° for 3 h and cooled to 23°, tert-butanol (3 mL) wasthen added and the resulting mixture was stirred at 23° for 16 h. Themixture was diluted with EtOAc and washed with H₂O. The organic layerwas dried over Na₂SO₄, and concentrated to give the crude intermediate670 mg.

b) Tetrahydro-furan-3-ylamine hydrochloride

To a soln of the crude (tetrahydro-furan-3-yl)-carbamic acid tert-butylester (460 mg) in EtOAc (10 mL) was added 2 mL of 4N HCl in 1,4-dioxane.The mixture was stirred at 23° for 16 h, then concentrated to give crudematerial 240 mg.

c)8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(tetrahydro-furan-3-ylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 195, the product ofExample 48 (125 mg, 0.28 mmol), the crude tetrahydro-furan-3-ylaminehydrochloride (240 mg) and triethylamine (0.27 mL, 1.9 mmol) werereacted to give the crude material. Purification by flashchromatography, eluting with EtOAc/hexane/triethylamine (50/50/2,v/v/v), gave the desired product (38 mg, 30%). LC-MS: 453.2 (MH+, m/z),2.20 (Rt, min).

Example 227

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[(2-hydroxy-ethyl)-methyl-amino]-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 126, the product ofExample 48 (100 mg, 0.22 mmol), N-methylethanolamine (0.05 mL, 0.66mmol) were reacted for 2 h to give the crude material, which waspurified by preparative hplc to affored the title compound, 26 mg (27%).LC-MS: 441.2 (MH+, m/z), 2.19 (Rt, min).

Example 228

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[2-(1H-imidazol-4-yl)-ethylamino]-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 217, the product ofExample 48 (150 mg, 0.34 mmol) and histamine (187 mg, 1.68 mmol) werereacted to give the desired product 50 mg (31%). LC-MS: 477.0 (MH+,m/z), 1.59 (Rt, min).

Example 229

[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidine-2-ylamino]-acetamide

To a soln of trimethylaluminum (3.3 mL, 6.6 mmol) in dichloromethane wasbubbled NH₃ gas for 30 min, the product of Example 190 (500 mg, 1.1mmol) was then added. The resulting mixture was stirred for 16 h. Themixture was diluted with EtOAc and washed with H₂O to give the crudematerial. Purification by flash chromatography, eluting withEtOAc/triethylamine (100/2, v/v), gave the desired product (263 mg,54%). LC-MS: 440.0 (MH+, m/z), 1.75 (Rt, min).

Example 230

Cyclopropanecarboxylic acid[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidine-2-yl]-amidea)2-Amino-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

To a solution of the product of Example 48 (1.0 g, 2.2 mmol) andtriethylamine (1 mL) in 2 mL of NMP was bubbled NH₃ gas at 23° for 30min. The mixture was diluted with EtOAc and washed with H₂O to give thecrude material. Purification by flash chromatography eluting withEtOAc/hexane/triethylamine (50/50/2, v/v/v), followed byrecrystallization from dichloromethane and hexane, gave the titlecompound, (360 mg, 43%). LC-MS: 383.0 (MH+, m/z), 1.95 (Rt, min).

b) Cyclopropanecarboxylicacid[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidine-2-yl]-amide

To a solution of the product of Example 230(a),2-amino-8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one(100 mg, 0.26 mmol) in 3 mL of tetrahydrofuran was added NaH (19 mg,0.78 mmol). The mixture was stirred for 20 min at 23°, a soln ofcyclopropanecarbonyl chloride (27 mg, 0.26 mmol) in tetrahydrofuran (1mL) was added. The resulting mixture was heated to solvent reflux for 16h to give the crude material, which was purified by preparative hplc toafford 25 mg (21%). LC-MS: 451.2 (MH+, m/z), 2.14 (Rt, min).

Example 231

Cyclopropanecarboxylicacid(1-cyclopropyl-methanoyl)-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]-amide

A second compound from the reaction of Example 230 after hplcpurification was the purified tile compound, 33 mg (24%). LC-MS: 519.0m/z), 2.37 (Rt, min).

Example 232

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-oxo-2-thiomorpholin-4-yl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 193, thiomorpholine(0.22 mL, 2.2 mmol), trimethylaluminum (1.1 mL, 2.2 mmol) and theproduct of Example 190 (200 mg, 0.44 mmol) were reacted to give thedesired product 200 mg (86%). LC-MS: 526.0 (MH+, m/z), 2.07 (Rt, min).

Example 233

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[(tetrahydro-furan-2-ylmethyl)-amino]-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 225, the product ofExample 48 (100 mg, 0.22 mmol) and tetrahydrofurfurylamine (0.07 mL,0.66 mmol) afforded the title compound, 50 mg (49%). LC-MS: 467.0 (MH+,m/z), 2.22 (Rt, min)

Example 234

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[2-(3-hydroxy-azetidin-1-yl)-2-oxo-ethylamino]-8H-pyrido[2,3-d]pyrimidin-7-onea) Azetidin-3-ol hydrochloride

To a soln of 1-benzhydrylazetan-3-ol (1.0 g, 4.16 mmol) in methanol (20mL) were added 10% Pd/C (1.0 g) and 4N HCl in 1,4-dioxane (2 mL). Themixture was flushed with Ar, and then stirred on Parr apparatus at 40psi H₂ for 6 h at 60°. The mixture was cooled to room temperature andfiltered through celite. The filtrate was concentrated and the resultingsolid was washed with diethyl ether to give the desired product 0.31 g(68%). ¹H NMR (MeOD-d₄): δ 4.17 (m, 1H), 4.22 (m, 2H), 3.91 (m, 2H).

b)8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[2-(3-hydroxy-azetidin-1-yl)-2-oxo-ethylamino]-8H-pyrido[2,3-d]pyrimidin-7-one

A mixture of[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-aceticacid (100 mg, 0.23 mmol), azetidin-3-ol hydrochloride (37 mg, 0.34),o-benzotriazol-1-yl-N,N,N′,N′-tetramethyluronium hexafluorophosphate(129 mg, 0.34 mmol) and N-methyl-morpholine (0.12 mL, 1.13 mmol) in DMF(2 mL) was stirred at 23° for 16 h to give the crude material, which waspurified by preparative hplc to afford the title compound 56 mg (49%).LC-MS: 496.2 (MH+, m/z), 1.69 (Rt, min).

Example 235

4-(4-Fluoro-2-methyl-phenyl)-2-((R)-2-hydroxy-propylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 225, the product of121 (120 mg, 0.28 mmol) and R(−)-1-amino-2-propanol (0.064 mL, 0.85mmol) were reacted to give the crude material. Purification by flashchromatography eluting with EtOAc/hexane/triethylamine (50/50/2, v/v/v),followed by recrystallization from dichloromethane and hexane, affordedthe desired product 110 mg (94%). LC-MS: 419.0 (MH+, m/z), 1.83 (Rt,min).

Example 236

4-(4-Fluoro-2-methyl-phenyl)-2-(2-hydroxy-2-methyl-propylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 225, the product ofExample 121 (120 mg, 0.28 mmol) and 1-amino-2-methyl-2-propanol (76 mg,0.85 mmol) were reacted to give the crude material. Purification byflash chromatography eluting with EtOAc/hexane/triethylamine (50/50/2,v/v/v), followed by recrystallization from dichloromethane and hexane,afforded the desired product 96 mg (79%). LC-MS: 433.4 (MH+, m/z), 1.87(Rt, min).

Example 237

(1SR,2RS)-2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-cyclopentanecarboxylicacid amide

Following the general procedure outlined in Example 225, the product ofExample 48 (150 mg, 0.34 mmol) and cis-2-amino-1-cyclopentanecarboxamide(139 mg, 1.02 mmol) were reacted to give the crude material.Purification by flash chromatography eluting withEtOAc/hexane/triethylamine (50/50/2, v/v/v), followed byrecrystallization from dichloromethane and hexane, afforded the desiredproduct, 87 mg (52%). LC-MS: 494.0 (MEI+, m/z), 2.00 (Rt, min).

Example 238

4-(4-Fluoro-2-methyl-phenyl)-2-((S)-2-hydroxy-propylamino)-8-o-tolyl-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 225, the product of121 (220 mg, 0.52 mmol) and (S)-(+)-1-amino-2-propanol (0.12 mL, 1.56mmol) were reacted to give the crude material. Purification by Flashchromatography eluting with EtOAc/hexane/triethylamine (50/50/2, v/v/v),followed by recrystallization from dichloromethane and hexane, affordedthe desired product, the desired product 135 mg (62%). LC-MS: 419.2(MH+, m/z), 1.79 (Rt, min).

Example 239

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-methylamino-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 225, the product ofExample 48 (1.0 g, 2.24 mmol) and methylamine (5.6 mL, 11.2 mmol) werereacted to give the crude material. Purification by flash chromatographyeluting with EtOAc/hexane/triethylamine (30/70/2, v/v/v), followed byrecrystallization from dichloromethane and hexane, gave the desiredproduct 430 mg (48%). LC-MS: 397.2 (MH+, m/z), 2.14 (Rt, min).

Example 240

8-(2,6-Difluoro-phenyl)-2-[2-(1,1-dioxo-1l⁶-thiomorpholin-4-yl)-2-oxo-ethylamino]-4-(4-fluoro-2-methyl-phenyl)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the procedure outlined in Example 215, the product of Example232,8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(2-oxo-2-thiomorpholin-4-yl-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one(164 mg, 0.31 mmol) and m-chloroperbenzoic acid (156 mg, 0.62 mmol) werereacted to give the desired product 165 mg (95%). LC-MS: 558.2 (MH+,m/z), 1.77 (Rt, min).

Example 241

2-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-(3-(2-oxo-pyrrolidin-1-yl)-propylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Following the general procedure outlined in Example 225, the product ofExample 48 (100 mg, 0.22 mmol) and N-(3′-aminopropyl)-2-pyrrolidinone(96 mg, 0.67 mmol) were reacted to give the crude material. Purificationby flash chromatography eluting with EtOAc/hexane/triethylamine(70/30/2, v/v/v), followed by recrystallization from ethanol and hexane,gave the desired product 95 mg (85%). LC-MS: 508.2 (MH+, m/z), 2.02 (Rt,min).

Example 242

3-[8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-N-hydroxy-propionamidine

Under Ar, a soln of hydroxylamine hydrochloride (119 mg, 1.72 mmol) andtriethylamine (0.26 mL, 1.89 mmol) in 5 mL of DMSO was stirred at roomtemperature for 5 min, the product of Example 206,3-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-propionitrile(150 mg, 0.34 mmol) was added. The resulting mixture was heated to 80°for 16 h. Preparative hplc, followed by recrystallization from ethanoland hexane, gave the desired product 80 mg (45%). LC-MS: 469.2 (MH+,m/z), 1.52 (Rt, min).

Example 243

8-(2,6-Difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-2-[2-(5-oxo-4,5-dihydro-[1,2,4]-oxadiazol-3-yl)-ethylamino)-8H-pyrido[2,3-d]pyrimidin-7-one

Under Ar, to a soln of the product of Example 242,3-[8-(2,6-difluoro-phenyl)-4-(4-fluoro-2-methyl-phenyl)-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino]-N-hydroxy-propionamidine(100 mg, 0.20 mmol), and pyridine (0.048 mL, 0.6 mmol), was added2-ethylhexyl chloroformate (0.039 mL, 0.2 mmol). The mixture was stirredat room temperature for 2 h, then diluted with H₂O and extracted withEtOAc. The organic layer was dried over sodium sulfate, filtered andconcentrated. The resulting residue was diluted with xylene (10 mL) andheated to reflux for 18 h to give the crude material, which was purifiedby preparative hplc to give the desired product 28 mg (28%). LC-MS:495.0 (MH+, m/z), 1.96 (Rt, min).

All publications, including but not limited to patents and patentapplications, cited in this specification are herein incorporated byreference as if each individual publication were specifically andindividually indicated to be incorporated by reference herein as thoughfully set forth.

The above description fully discloses the invention including preferredembodiments thereof. Modifications and improvements of the embodimentsspecifically disclosed herein are within the scope of the followingclaims. Without further elaboration, it is believed that one skilled inthe are can, using the preceding description, utilize the presentinvention to its fullest extent. Therefore, the Examples herein are tobe construed as merely illustrative and not a limitation of the scope ofthe present invention in any way. The embodiments of the invention inwhich an exclusive property or privilege is claimed are defined asfollows.

1. A compound of the formula:

wherein R₁ is an optionally substituted aryl or an optionallysubstituted heteroaryl ring; R₂ is hydrogen, C₁₋₁₀ alkyl, C₃₋₇cycloalkyl, C₃₋₇ cycloalkylalkyl, aryl, arylC₁₋₁₀ alkyl, heteroaryl,heteroarylC₁₋₁₀ alkyl, heterocyclic, or a heterocyclylC₁₋₁₀ alkylmoiety, which moieties are all optionally substituted, or R₂ is themoiety X₁ (CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), or C(A₁)(A₂)(A₃); A₁ is anoptionally substituted C₁₋₁₀ alkyl; A₂ is an optionally substitutedC₁₋₁₀ alkyl; A₃ is hydrogen or is an optionally substituted C₁₋₁₀ alkyl;R₃ is an C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇ cycloalkylC₁₋₄alkyl, aryl,arylC₁₋₁₀ alkyl, heteroaryl, heteroarylC₁₋₁₀ alkyl, heterocyclic, or aheterocyclylC₁₋₁₀ alkyl moiety, which moieties are optionallysubstituted; R₄ and R₁₄ are each independently selected from hydrogen,optionally substituted C₁₋₄ alkyl, optionally substituted C₃₋₇cycloalkyl, C₃₋₇ cycloalkylC₁₋₄alkyl, optionally substituted aryl, oroptionally substituted aryl-C₁₋₄ alkyl, or R₄ and R₁₄ together with thenitrogen which they are attached form an optionally substitutedheterocyclic ring of 4 to 7 members, which ring optionally contains anadditional heteroatom selected from oxygen, sulfur or NR₉; R₆ ishydrogen, C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, heterocyclyl, heterocyclylC₁₋₁₀alkyl, aryl, arylC₁₋₁₀ alkyl, heteroaryl or heteroarylC₁₋₁₀ alkyl,wherein each of these moieties may be optionally substituted; R₉ ishydrogen, C(Z)R₆ or optionally substituted C₁₋₁₀ alkyl, optionallysubstituted aryl or optionally substituted aryl-C₁₋₄ alkyl; R₁₀ and R₂₀are independently selected from hydrogen or C₁₋₄alkyl; X is R₂, OR₂,S(O)_(m)R₂, (CH₂)_(n)N(R₁₀)S(O)_(m)R₂, (CH₂)_(n)N(R₁₀)C(O)R₂,(CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂; X₁ is N(R₁₀), O, S(O)_(m), orCR₁₀R₂₀; n is 0 or an integer having a value of 1 to 10; m is 0 or aninteger having a value of 1 or 2; q is 0 or an integer having a value of1 to 10; Z is oxygen or sulfur; or a pharmaceutically acceptable saltthereof.
 2. The compound according to claim 1 which is Formula (I), or apharmaceutically acceptable salt thereof.
 3. The compound according toclaim 1 which is Formula (Ia), or a pharmaceutically acceptable saltthereof.
 4. The compound according to claim 1 wherein R₁ is anoptionally substituted phenyl or napthyl.
 5. The compound according toclaim 2 wherein R₁ is an optionally substituted phenyl or napthyl. 6.The compound according to claim 3 wherein R₁ is an optionallysubstituted phenyl or napthyl.
 7. The compound according to claim 4wherein R₁ is a phenyl substituted one or more times independently byhalogen, alkyl, hydroxy, alkoxy, amino, or halosubstituted alkyl.
 8. Thecompound according to claim 5 wherein R₁ is a phenyl substituted one ormore times independently by halogen, alkyl, hydroxy, alkoxy, amino, orhalosubstituted alkyl.
 9. The compound according to claim 6 wherein R₁is a phenyl substituted one or more times independently by halogen,alkyl, hydroxy, alkoxy, amino, or halosubstituted alkyl.
 10. Thecompound according to claim 7 wherein the substituents are independentlyfluorine, C₁₋₄ alkyl, or CF₃.
 11. The compound according to claim 8wherein the substituents are independently fluorine, C₁₋₄ alkyl, or CF₃.12. The compound according to claim 9 wherein the substituents areindependently fluorine, C₁₋₄ alkyl, or CF₃.
 13. The compound accordingto claim 5 wherein R_(i) is a phenyl ring substituted in the 2, 4, or6-position, di-substituted in the 2,4-position, or tri-substituted inthe 2,4,6-position.
 14. The compound according to claim 1 wherein X isOR₂, or S(O)_(m)R₂.
 15. The compound according to claim 2 wherein X isOR₂, or S(O)_(m)R₂.
 16. The compound according to claim 3 wherein X isOR₂, or S(O)_(m)R₂.
 17. The compound according to claim 1 wherein X is(CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂.
 18. The compound according to claim2 wherein X is (CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂.
 19. The compoundaccording to claim 3 wherein X is (CH₂)_(n)NR₄R₁₄, or (CH₂)_(n)N(R₂)₂.20. The compound according to claim 1 wherein X is R₂ or(CH₂)_(n)N(R₁₀)S(O)_(m)R₂, or (CH₂)_(n)N(R₁₀)C(O)R₂.
 21. The compoundaccording to claim 1 wherein R₂ is optionally substituted independentlyone or more times with C₁₋₁₀ alkyl, halo-substituted C₁₋₁₀ alkyl, C₂₋₁₀alkenyl, C₂₋₁₀ alkynyl, C₃₋₇ cycloalkyl, C₃₋₇cycloalkylC₁₋₁₀alkyl,C₅₋₇cycloalkenyl, C₅₋₇ cycloalkenyl C₁₋₁₀ alkyl, halogen, —CH(O), cyano,nitro, (CR₁₀R₂₀)_(n)OR₆, (CR₁₀R₂₀)_(n)SH, (CR₁₀R₂₀)_(n)S(O)_(m)R₇,(CR₁₀R₂₀)_(n)NR₁₀S(O)₂R₇, (CR₁₀R₂₀)_(n)NR₄R₁₄, (CR₁₀R₂₀)_(n)CN,(CR₁₀R₂₀)_(n)S(O)₂NR₄R₁₄, (CR₁₀R₂₀)_(n)C(Z)R₆, (CR₁₀R₂₀)_(n)OC(Z)R₆,(CR₁₀R₂₀)_(n)C(Z)OR₆, (CR₁₀R₂₀)_(n)C(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)R₆,(CR₁₀R₂₀)_(n)NR₁₀C(═NR₁₀)NR₄R₁₄, (CR₁₀R₂₀)_(n)C(═NOR₆)NR₄R₁₄,(CR₁₀R₂₀)_(n)OC(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)NR₄R₁₄, or(CR₁₀R₂₀)_(n)NR₁₀C(Z)OR₇. and wherein R₇ is a C₁₋₆alkyl, aryl,arylC₁₋₆alkyl, heterocyclic, heterocyclylC₁₋₆ alkyl, heteroaryl, orheteroarylC₁₋₆alkyl moiety; and wherein each of these moieties may beoptionally substituted.
 22. The compound according to claim 21 whereinR₂ is an optionally substituted alkyl.
 23. The compound according toclaim 22 wherein the alkyl is an optionally substituted by(CR₁₀R₂₀)_(n)C(Z)OR₆, (CR₁₀R₂₀)_(n)OR₆, or (CR₁₀R₂₀)_(n)NR₄R₁₄.
 24. Thecompound according to claim 1 wherein R₂ isX₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), or C(A₁)(A₂)(A₃).
 25. The compoundaccording to claim 2 wherein R₂ is X₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), orC(A₁)(A₂)(A₃).
 26. The compound according to claim 3 wherein R₂ isX₁(CR₁₀R₂₀)_(q)C(A₁)(A₂)(A₃), or C(A₁)(A₂)(A₃).
 27. The compoundaccording to claim 24 wherein X₁ is oxygen or N(R₁₀).
 28. The compoundaccording to claim 27 wherein at least one of A₁, A₂ or A₃ issubstituted by (CR₁₀R₂₀)_(n)OR₆.
 29. The compound according to claim 28wherein q is 0 or
 1. 30. The compound according to claim 1 wherein R₃ isan optionally substituted C₁₋₁₀ alkyl, C₃₋₇ cycloalkyl, C₃₋₇cycloalkylC₁₋₄alkyl or aryl.
 31. The compound according to claim 30wherein R₃ is optionally substituted one or more times independentlywith C₁₋₁₀ alkyl, halo-substituted C₁₋₁₀ alkyl, C₂₋₁₀ alkenyl,C₂₋₁₀alkynyl, C₃₋₇ cycloalkyl, C₃₋₇cycloalkylC₁₋₁₀ alkyl,C₅₋₇cycloalkenyl, C₅₋₇cycloalkenylC₁₋₁₀ alkyl, halogen, cyano, nitro,(CR₁₀R₂₀)_(n)OR₆, (CR₁₀R₂₀)_(n)SH, (CR₁₀R₂₀)_(n)S(O)_(m)R₇,(CR₁₀R₂₀)_(n)NR₁₀S(O)₂R₇, (CR₁₀R₂₀)_(n)NR₄R₁₄, (CR₁₀R₂₀)_(n)CN,(CR₁₀R₂₀)_(n)S(O)₂NR₄R₁₄, (CR₁₀R₂₀)_(n)C(Z)R₆, (CR₁₀R₂₀)_(n)OC(Z)R₆,(CR₁₀R₂₀)_(n)C(Z)OR₆, (CR₁₀R₂₀)_(n)C(Z)NR₄R₁₄, (CR₁₀R₂₀)_(n)NR₁₀C(Z)R₆,(CR₁₀R₂₀)_(n)NR₁₀C(═NR₁₀)NR₄R₁₄, (CR₁₀R₂₀)_(n)OC(Z)NR₄R₁₄,(CR₁₀R₂₀)_(n)NR₁₀C(Z)NR₄R₁₄, or (CR₁₀R₂₀)_(n)NR₁₀C(Z)OR₇ and wherein R₇is a C₁₋₆alkyl, aryl, arylC₁₋₆alkyl, heterocyclic, heterocyclylC₁₋₆alkyl, heteroaryl, or heteroarylC₁₋₆alkyl moiety; and wherein each ofthese moieties may be optionally substituted.
 32. The compound accordingto claim 31 wherein the R₃ optional substituent is halogen, alkyl,hydroxy, alkoxy, amino, or halosubstituted alkyl.
 33. The compoundaccording to claim 31 wherein R₃ is optionally substituted aryl.
 34. Thecompound according to claim 33 wherein R₃ is optionally substitutedphenyl.
 35. A pharmaceutical composition comprising an effective amountof a compound according to claim 1 and a pharmaceutically acceptablecarrier or diluent.